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Finding the Fourth Proportional to 457,402.40, 686,103.60 and 141,891.20

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Solution

The fourth proportional to 457,402.40, 686,103.60 and 141,891.20 is: 212,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,402.40 : 686,103.60 = 141,891.20 : x
  2. Step 2: Convert to fraction form
    457,402.40/686,103.60 = 141,891.20/x
  3. Step 3: Cross multiply
    457,402.40x = 686,103.60 × 141,891.20
  4. Step 4: Simplify right side
    457,402.40x = 97,352,063,128.32
  5. Step 5: Solve for x
    x = 97,352,063,128.32/457,402.40
  6. Step 6: Final answer
    x = 212,836.80

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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.