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Finding the Fourth Proportional to 1,083.53, 1,505.31 and 1,073.40

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Solution

The fourth proportional to 1,083.53, 1,505.31 and 1,073.40 is: 1,491.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,083.53 : 1,505.31 = 1,073.40 : x
  2. Step 2: Convert to fraction form
    1,083.53/1,505.31 = 1,073.40/x
  3. Step 3: Cross multiply
    1,083.53x = 1,505.31 × 1,073.40
  4. Step 4: Simplify right side
    1,083.53x = 1,615,799.75
  5. Step 5: Solve for x
    x = 1,615,799.75/1,083.53
  6. Step 6: Final answer
    x = 1,491.24

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.