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Finding the Fourth Proportional to 1,004.13, 1,385.49 and 672.12

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Solution

The fourth proportional to 1,004.13, 1,385.49 and 672.12 is: 927.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,004.13 : 1,385.49 = 672.12 : x
  2. Step 2: Convert to fraction form
    1,004.13/1,385.49 = 672.12/x
  3. Step 3: Cross multiply
    1,004.13x = 1,385.49 × 672.12
  4. Step 4: Simplify right side
    1,004.13x = 931,215.54
  5. Step 5: Solve for x
    x = 931,215.54/1,004.13
  6. Step 6: Final answer
    x = 927.39

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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.