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Finding the Fourth Proportional to 708.01, 1,059.68 and 432.81

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Solution

The fourth proportional to 708.01, 1,059.68 and 432.81 is: 647.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    708.01 : 1,059.68 = 432.81 : x
  2. Step 2: Convert to fraction form
    708.01/1,059.68 = 432.81/x
  3. Step 3: Cross multiply
    708.01x = 1,059.68 × 432.81
  4. Step 4: Simplify right side
    708.01x = 458,641.18
  5. Step 5: Solve for x
    x = 458,641.18/708.01
  6. Step 6: Final answer
    x = 647.79

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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.