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Finding the Fourth Proportional to 1,479.91, 2,220.87 and 614.22

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Solution

The fourth proportional to 1,479.91, 2,220.87 and 614.22 is: 921.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,479.91 : 2,220.87 = 614.22 : x
  2. Step 2: Convert to fraction form
    1,479.91/2,220.87 = 614.22/x
  3. Step 3: Cross multiply
    1,479.91x = 2,220.87 × 614.22
  4. Step 4: Simplify right side
    1,479.91x = 1,364,102.77
  5. Step 5: Solve for x
    x = 1,364,102.77/1,479.91
  6. Step 6: Final answer
    x = 921.75

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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.