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Finding the Fourth Proportional to 1,646.88, 2,472.48 and 1,125.24

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Solution

The fourth proportional to 1,646.88, 2,472.48 and 1,125.24 is: 1,689.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,646.88 : 2,472.48 = 1,125.24 : x
  2. Step 2: Convert to fraction form
    1,646.88/2,472.48 = 1,125.24/x
  3. Step 3: Cross multiply
    1,646.88x = 2,472.48 × 1,125.24
  4. Step 4: Simplify right side
    1,646.88x = 2,782,133.40
  5. Step 5: Solve for x
    x = 2,782,133.40/1,646.88
  6. Step 6: Final answer
    x = 1,689.34

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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.