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Finding the Fourth Proportional to 1,614.40, 2,227.84 and 916

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Solution

The fourth proportional to 1,614.40, 2,227.84 and 916 is: 1,264.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,614.40 : 2,227.84 = 916 : x
  2. Step 2: Convert to fraction form
    1,614.40/2,227.84 = 916/x
  3. Step 3: Cross multiply
    1,614.40x = 2,227.84 × 916
  4. Step 4: Simplify right side
    1,614.40x = 2,040,701.44
  5. Step 5: Solve for x
    x = 2,040,701.44/1,614.40
  6. Step 6: Final answer
    x = 1,264.06

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.