Home / 638,976,043.40-958,464,065.10-256,298,232.20

Finding the Fourth Proportional to 638,976,043.40, 958,464,065.10 and 256,298,232.20

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Solution

The fourth proportional to 638,976,043.40, 958,464,065.10 and 256,298,232.20 is: 384,447,348.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,976,043.40 : 958,464,065.10 = 256,298,232.20 : x
  2. Step 2: Convert to fraction form
    638,976,043.40/958,464,065.10 = 256,298,232.20/x
  3. Step 3: Cross multiply
    638,976,043.40x = 958,464,065.10 × 256,298,232.20
  4. Step 4: Simplify right side
    638,976,043.40x = 245,652,645,512,355,712
  5. Step 5: Solve for x
    x = 245,652,645,512,355,712/638,976,043.40
  6. Step 6: Final answer
    x = 384,447,348.30

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Double scale
Find fourth proportional to 638,976,044.40, 958,464,066.60 and 256,298,233.20
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.