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Finding the Fourth Proportional to 1,352.88, 2,029.76 and 487.26

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Solution

The fourth proportional to 1,352.88, 2,029.76 and 487.26 is: 731.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,352.88 : 2,029.76 = 487.26 : x
  2. Step 2: Convert to fraction form
    1,352.88/2,029.76 = 487.26/x
  3. Step 3: Cross multiply
    1,352.88x = 2,029.76 × 487.26
  4. Step 4: Simplify right side
    1,352.88x = 989,020.86
  5. Step 5: Solve for x
    x = 989,020.86/1,352.88
  6. Step 6: Final answer
    x = 731.05

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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.