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Finding the Fourth Proportional to 930.29, 1,400.82 and 672.04

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Solution

The fourth proportional to 930.29, 1,400.82 and 672.04 is: 1,011.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.29 : 1,400.82 = 672.04 : x
  2. Step 2: Convert to fraction form
    930.29/1,400.82 = 672.04/x
  3. Step 3: Cross multiply
    930.29x = 1,400.82 × 672.04
  4. Step 4: Simplify right side
    930.29x = 941,406.30
  5. Step 5: Solve for x
    x = 941,406.30/930.29
  6. Step 6: Final answer
    x = 1,011.95

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.