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Finding the Fourth Proportional to 710.72, 1,060.40 and 632.76

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Solution

The fourth proportional to 710.72, 1,060.40 and 632.76 is: 944.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    710.72 : 1,060.40 = 632.76 : x
  2. Step 2: Convert to fraction form
    710.72/1,060.40 = 632.76/x
  3. Step 3: Cross multiply
    710.72x = 1,060.40 × 632.76
  4. Step 4: Simplify right side
    710.72x = 670,978.70
  5. Step 5: Solve for x
    x = 670,978.70/710.72
  6. Step 6: Final answer
    x = 944.08

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.