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Finding the Fourth Proportional to 1,149.04, 1,721.17 and 953.58

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Solution

The fourth proportional to 1,149.04, 1,721.17 and 953.58 is: 1,428.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,149.04 : 1,721.17 = 953.58 : x
  2. Step 2: Convert to fraction form
    1,149.04/1,721.17 = 953.58/x
  3. Step 3: Cross multiply
    1,149.04x = 1,721.17 × 953.58
  4. Step 4: Simplify right side
    1,149.04x = 1,641,273.29
  5. Step 5: Solve for x
    x = 1,641,273.29/1,149.04
  6. Step 6: Final answer
    x = 1,428.39

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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.