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Finding the Fourth Proportional to 1,092, 1,507.71 and 672.90

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Solution

The fourth proportional to 1,092, 1,507.71 and 672.90 is: 929.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,092 : 1,507.71 = 672.90 : x
  2. Step 2: Convert to fraction form
    1,092/1,507.71 = 672.90/x
  3. Step 3: Cross multiply
    1,092x = 1,507.71 × 672.90
  4. Step 4: Simplify right side
    1,092x = 1,014,538.06
  5. Step 5: Solve for x
    x = 1,014,538.06/1,092
  6. Step 6: Final answer
    x = 929.06

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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.