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Finding the Fourth Proportional to 657,256.60, 985,884.90 and 432,870.40

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Solution

The fourth proportional to 657,256.60, 985,884.90 and 432,870.40 is: 649,305.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,256.60 : 985,884.90 = 432,870.40 : x
  2. Step 2: Convert to fraction form
    657,256.60/985,884.90 = 432,870.40/x
  3. Step 3: Cross multiply
    657,256.60x = 985,884.90 × 432,870.40
  4. Step 4: Simplify right side
    657,256.60x = 426,760,391,016.96
  5. Step 5: Solve for x
    x = 426,760,391,016.96/657,256.60
  6. Step 6: Final answer
    x = 649,305.60

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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.