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Finding the Fourth Proportional to 710.92, 1,064.76 and 638.02

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Solution

The fourth proportional to 710.92, 1,064.76 and 638.02 is: 955.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.92 : 1,064.76 = 638.02 : x
  2. Step 2: Convert to fraction form
    710.92/1,064.76 = 638.02/x
  3. Step 3: Cross multiply
    710.92x = 1,064.76 × 638.02
  4. Step 4: Simplify right side
    710.92x = 679,338.18
  5. Step 5: Solve for x
    x = 679,338.18/710.92
  6. Step 6: Final answer
    x = 955.58

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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.