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Finding the Fourth Proportional to 1,913.13, 2,869.74 and 614.61

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Solution

The fourth proportional to 1,913.13, 2,869.74 and 614.61 is: 921.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.13 : 2,869.74 = 614.61 : x
  2. Step 2: Convert to fraction form
    1,913.13/2,869.74 = 614.61/x
  3. Step 3: Cross multiply
    1,913.13x = 2,869.74 × 614.61
  4. Step 4: Simplify right side
    1,913.13x = 1,763,770.90
  5. Step 5: Solve for x
    x = 1,763,770.90/1,913.13
  6. Step 6: Final answer
    x = 921.93

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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.