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Finding the Fourth Proportional to 932.96, 1,398.72 and 316.30

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Solution

The fourth proportional to 932.96, 1,398.72 and 316.30 is: 474.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.96 : 1,398.72 = 316.30 : x
  2. Step 2: Convert to fraction form
    932.96/1,398.72 = 316.30/x
  3. Step 3: Cross multiply
    932.96x = 1,398.72 × 316.30
  4. Step 4: Simplify right side
    932.96x = 442,415.14
  5. Step 5: Solve for x
    x = 442,415.14/932.96
  6. Step 6: Final answer
    x = 474.21

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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.