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Finding the Fourth Proportional to 1,010.52, 1,393.47 and 715.68

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Solution

The fourth proportional to 1,010.52, 1,393.47 and 715.68 is: 986.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,010.52 : 1,393.47 = 715.68 : x
  2. Step 2: Convert to fraction form
    1,010.52/1,393.47 = 715.68/x
  3. Step 3: Cross multiply
    1,010.52x = 1,393.47 × 715.68
  4. Step 4: Simplify right side
    1,010.52x = 997,278.61
  5. Step 5: Solve for x
    x = 997,278.61/1,010.52
  6. Step 6: Final answer
    x = 986.90

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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.