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Finding the Fourth Proportional to 715.86, 988.47 and 529.56

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Solution

The fourth proportional to 715.86, 988.47 and 529.56 is: 731.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.86 : 988.47 = 529.56 : x
  2. Step 2: Convert to fraction form
    715.86/988.47 = 529.56/x
  3. Step 3: Cross multiply
    715.86x = 988.47 × 529.56
  4. Step 4: Simplify right side
    715.86x = 523,454.17
  5. Step 5: Solve for x
    x = 523,454.17/715.86
  6. Step 6: Final answer
    x = 731.22

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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.