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Finding the Fourth Proportional to 710.68, 1,065.02 and 436.72

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Solution

The fourth proportional to 710.68, 1,065.02 and 436.72 is: 654.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.68 : 1,065.02 = 436.72 : x
  2. Step 2: Convert to fraction form
    710.68/1,065.02 = 436.72/x
  3. Step 3: Cross multiply
    710.68x = 1,065.02 × 436.72
  4. Step 4: Simplify right side
    710.68x = 465,115.53
  5. Step 5: Solve for x
    x = 465,115.53/710.68
  6. Step 6: Final answer
    x = 654.47

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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.