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Finding the Fourth Proportional to 1,913.06, 2,869.61 and 614.52

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Solution

The fourth proportional to 1,913.06, 2,869.61 and 614.52 is: 921.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,913.06 : 2,869.61 = 614.52 : x
  2. Step 2: Convert to fraction form
    1,913.06/2,869.61 = 614.52/x
  3. Step 3: Cross multiply
    1,913.06x = 2,869.61 × 614.52
  4. Step 4: Simplify right side
    1,913.06x = 1,763,429.66
  5. Step 5: Solve for x
    x = 1,763,429.66/1,913.06
  6. Step 6: Final answer
    x = 921.79

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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.