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Finding the Fourth Proportional to 704,438.13, 972,124.62 and 402,638.61

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Solution

The fourth proportional to 704,438.13, 972,124.62 and 402,638.61 is: 555,641.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,438.13 : 972,124.62 = 402,638.61 : x
  2. Step 2: Convert to fraction form
    704,438.13/972,124.62 = 402,638.61/x
  3. Step 3: Cross multiply
    704,438.13x = 972,124.62 × 402,638.61
  4. Step 4: Simplify right side
    704,438.13x = 391,414,905,743.58
  5. Step 5: Solve for x
    x = 391,414,905,743.58/704,438.13
  6. Step 6: Final answer
    x = 555,641.28

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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.