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Finding the Fourth Proportional to 932.61, 1,398.92 and 384.65

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Solution

The fourth proportional to 932.61, 1,398.92 and 384.65 is: 576.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.61 : 1,398.92 = 384.65 : x
  2. Step 2: Convert to fraction form
    932.61/1,398.92 = 384.65/x
  3. Step 3: Cross multiply
    932.61x = 1,398.92 × 384.65
  4. Step 4: Simplify right side
    932.61x = 538,085.66
  5. Step 5: Solve for x
    x = 538,085.66/932.61
  6. Step 6: Final answer
    x = 576.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.