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Finding the Fourth Proportional to 657,258.60, 985,887.90 and 432,872.40

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Solution

The fourth proportional to 657,258.60, 985,887.90 and 432,872.40 is: 649,308.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,258.60 : 985,887.90 = 432,872.40 : x
  2. Step 2: Convert to fraction form
    657,258.60/985,887.90 = 432,872.40/x
  3. Step 3: Cross multiply
    657,258.60x = 985,887.90 × 432,872.40
  4. Step 4: Simplify right side
    657,258.60x = 426,763,661,403.96
  5. Step 5: Solve for x
    x = 426,763,661,403.96/657,258.60
  6. Step 6: Final answer
    x = 649,308.60

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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.