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Finding the Fourth Proportional to 1,008.59, 1,392.50 and 672.97

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Solution

The fourth proportional to 1,008.59, 1,392.50 and 672.97 is: 929.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.59 : 1,392.50 = 672.97 : x
  2. Step 2: Convert to fraction form
    1,008.59/1,392.50 = 672.97/x
  3. Step 3: Cross multiply
    1,008.59x = 1,392.50 × 672.97
  4. Step 4: Simplify right side
    1,008.59x = 937,110.18
  5. Step 5: Solve for x
    x = 937,110.18/1,008.59
  6. Step 6: Final answer
    x = 929.13

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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.