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Finding the Fourth Proportional to 704,436.13, 972,121.86 and 402,636.61

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Solution

The fourth proportional to 704,436.13, 972,121.86 and 402,636.61 is: 555,638.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,436.13 : 972,121.86 = 402,636.61 : x
  2. Step 2: Convert to fraction form
    704,436.13/972,121.86 = 402,636.61/x
  3. Step 3: Cross multiply
    704,436.13x = 972,121.86 × 402,636.61
  4. Step 4: Simplify right side
    704,436.13x = 391,411,850,217.30
  5. Step 5: Solve for x
    x = 391,411,850,217.30/704,436.13
  6. Step 6: Final answer
    x = 555,638.52

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.