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Finding the Fourth Proportional to 972.57, 1,342.02 and 710.13

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Solution

The fourth proportional to 972.57, 1,342.02 and 710.13 is: 979.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    972.57 : 1,342.02 = 710.13 : x
  2. Step 2: Convert to fraction form
    972.57/1,342.02 = 710.13/x
  3. Step 3: Cross multiply
    972.57x = 1,342.02 × 710.13
  4. Step 4: Simplify right side
    972.57x = 953,008.66
  5. Step 5: Solve for x
    x = 953,008.66/972.57
  6. Step 6: Final answer
    x = 979.89

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.