Home / 639,117.40-958,676.10-403,504.60

Finding the Fourth Proportional to 639,117.40, 958,676.10 and 403,504.60

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Solution

The fourth proportional to 639,117.40, 958,676.10 and 403,504.60 is: 605,256.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    639,117.40 : 958,676.10 = 403,504.60 : x
  2. Step 2: Convert to fraction form
    639,117.40/958,676.10 = 403,504.60/x
  3. Step 3: Cross multiply
    639,117.40x = 958,676.10 × 403,504.60
  4. Step 4: Simplify right side
    639,117.40x = 386,830,216,260.06
  5. Step 5: Solve for x
    x = 386,830,216,260.06/639,117.40
  6. Step 6: Final answer
    x = 605,256.90

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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.