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Finding the Fourth Proportional to 1,001.18, 1,381.49 and 559.02

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Solution

The fourth proportional to 1,001.18, 1,381.49 and 559.02 is: 771.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001.18 : 1,381.49 = 559.02 : x
  2. Step 2: Convert to fraction form
    1,001.18/1,381.49 = 559.02/x
  3. Step 3: Cross multiply
    1,001.18x = 1,381.49 × 559.02
  4. Step 4: Simplify right side
    1,001.18x = 772,277.74
  5. Step 5: Solve for x
    x = 772,277.74/1,001.18
  6. Step 6: Final answer
    x = 771.37

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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.