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Finding the Fourth Proportional to 2,153.66, 3,231.03 and 614.66

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Solution

The fourth proportional to 2,153.66, 3,231.03 and 614.66 is: 922.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.66 : 3,231.03 = 614.66 : x
  2. Step 2: Convert to fraction form
    2,153.66/3,231.03 = 614.66/x
  3. Step 3: Cross multiply
    2,153.66x = 3,231.03 × 614.66
  4. Step 4: Simplify right side
    2,153.66x = 1,985,984.90
  5. Step 5: Solve for x
    x = 1,985,984.90/2,153.66
  6. Step 6: Final answer
    x = 922.14

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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.