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Finding the Fourth Proportional to 713.92, 1,070.88 and 425.02

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Solution

The fourth proportional to 713.92, 1,070.88 and 425.02 is: 637.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    713.92 : 1,070.88 = 425.02 : x
  2. Step 2: Convert to fraction form
    713.92/1,070.88 = 425.02/x
  3. Step 3: Cross multiply
    713.92x = 1,070.88 × 425.02
  4. Step 4: Simplify right side
    713.92x = 455,145.42
  5. Step 5: Solve for x
    x = 455,145.42/713.92
  6. Step 6: Final answer
    x = 637.53

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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.