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Finding the Fourth Proportional to 1,101.53, 1,654.88 and 1,039.26

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Solution

The fourth proportional to 1,101.53, 1,654.88 and 1,039.26 is: 1,561.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,101.53 : 1,654.88 = 1,039.26 : x
  2. Step 2: Convert to fraction form
    1,101.53/1,654.88 = 1,039.26/x
  3. Step 3: Cross multiply
    1,101.53x = 1,654.88 × 1,039.26
  4. Step 4: Simplify right side
    1,101.53x = 1,719,845.39
  5. Step 5: Solve for x
    x = 1,719,845.39/1,101.53
  6. Step 6: Final answer
    x = 1,561.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.