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Finding the Fourth Proportional to 657,078.40, 985,387.20 and 341,430.40

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Solution

The fourth proportional to 657,078.40, 985,387.20 and 341,430.40 is: 512,025.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,078.40 : 985,387.20 = 341,430.40 : x
  2. Step 2: Convert to fraction form
    657,078.40/985,387.20 = 341,430.40/x
  3. Step 3: Cross multiply
    657,078.40x = 985,387.20 × 341,430.40
  4. Step 4: Simplify right side
    657,078.40x = 336,441,145,850.88
  5. Step 5: Solve for x
    x = 336,441,145,850.88/657,078.40
  6. Step 6: Final answer
    x = 512,025.88

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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.