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Finding the Fourth Proportional to 1,143.03, 1,711.83 and 655.14

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Solution

The fourth proportional to 1,143.03, 1,711.83 and 655.14 is: 981.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,143.03 : 1,711.83 = 655.14 : x
  2. Step 2: Convert to fraction form
    1,143.03/1,711.83 = 655.14/x
  3. Step 3: Cross multiply
    1,143.03x = 1,711.83 × 655.14
  4. Step 4: Simplify right side
    1,143.03x = 1,121,488.31
  5. Step 5: Solve for x
    x = 1,121,488.31/1,143.03
  6. Step 6: Final answer
    x = 981.15

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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.