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Finding the Fourth Proportional to 715.34, 986.72 and 529.31

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Solution

The fourth proportional to 715.34, 986.72 and 529.31 is: 730.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    715.34 : 986.72 = 529.31 : x
  2. Step 2: Convert to fraction form
    715.34/986.72 = 529.31/x
  3. Step 3: Cross multiply
    715.34x = 986.72 × 529.31
  4. Step 4: Simplify right side
    715.34x = 522,280.58
  5. Step 5: Solve for x
    x = 522,280.58/715.34
  6. Step 6: Final answer
    x = 730.11

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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.