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Finding the Fourth Proportional to 932.28, 1,398.72 and 608.28

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Solution

The fourth proportional to 932.28, 1,398.72 and 608.28 is: 912.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    932.28 : 1,398.72 = 608.28 : x
  2. Step 2: Convert to fraction form
    932.28/1,398.72 = 608.28/x
  3. Step 3: Cross multiply
    932.28x = 1,398.72 × 608.28
  4. Step 4: Simplify right side
    932.28x = 850,813.40
  5. Step 5: Solve for x
    x = 850,813.40/932.28
  6. Step 6: Final answer
    x = 912.62

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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.