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Finding the Fourth Proportional to 639,256.40, 958,220.40 and 260,014.40

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Solution

The fourth proportional to 639,256.40, 958,220.40 and 260,014.40 is: 389,751.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,256.40 : 958,220.40 = 260,014.40 : x
  2. Step 2: Convert to fraction form
    639,256.40/958,220.40 = 260,014.40/x
  3. Step 3: Cross multiply
    639,256.40x = 958,220.40 × 260,014.40
  4. Step 4: Simplify right side
    639,256.40x = 249,151,102,373.76
  5. Step 5: Solve for x
    x = 249,151,102,373.76/639,256.40
  6. Step 6: Final answer
    x = 389,751.44

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Double scale
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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.