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Finding the Fourth Proportional to 487,425.40, 731,138.10 and 425,217.40

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Solution

The fourth proportional to 487,425.40, 731,138.10 and 425,217.40 is: 637,826.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,425.40 : 731,138.10 = 425,217.40 : x
  2. Step 2: Convert to fraction form
    487,425.40/731,138.10 = 425,217.40/x
  3. Step 3: Cross multiply
    487,425.40x = 731,138.10 × 425,217.40
  4. Step 4: Simplify right side
    487,425.40x = 310,892,641,922.94
  5. Step 5: Solve for x
    x = 310,892,641,922.94/487,425.40
  6. Step 6: Final answer
    x = 637,826.10

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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.