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Finding the Fourth Proportional to 1,008.01, 1,391.49 and 588.20

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Solution

The fourth proportional to 1,008.01, 1,391.49 and 588.20 is: 811.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.01 : 1,391.49 = 588.20 : x
  2. Step 2: Convert to fraction form
    1,008.01/1,391.49 = 588.20/x
  3. Step 3: Cross multiply
    1,008.01x = 1,391.49 × 588.20
  4. Step 4: Simplify right side
    1,008.01x = 818,472.68
  5. Step 5: Solve for x
    x = 818,472.68/1,008.01
  6. Step 6: Final answer
    x = 811.97

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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.