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Finding the Fourth Proportional to 2,153.12, 3,229.80 and 614

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Solution

The fourth proportional to 2,153.12, 3,229.80 and 614 is: 921.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,153.12 : 3,229.80 = 614 : x
  2. Step 2: Convert to fraction form
    2,153.12/3,229.80 = 614/x
  3. Step 3: Cross multiply
    2,153.12x = 3,229.80 × 614
  4. Step 4: Simplify right side
    2,153.12x = 1,983,097.20
  5. Step 5: Solve for x
    x = 1,983,097.20/2,153.12
  6. Step 6: Final answer
    x = 921.03

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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.