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Finding the Fourth Proportional to 932.73, 1,287.15 and 513.09

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Solution

The fourth proportional to 932.73, 1,287.15 and 513.09 is: 708.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.73 : 1,287.15 = 513.09 : x
  2. Step 2: Convert to fraction form
    932.73/1,287.15 = 513.09/x
  3. Step 3: Cross multiply
    932.73x = 1,287.15 × 513.09
  4. Step 4: Simplify right side
    932.73x = 660,423.79
  5. Step 5: Solve for x
    x = 660,423.79/932.73
  6. Step 6: Final answer
    x = 708.05

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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.