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Finding the Fourth Proportional to 3,509.97, 5,267.98 and 1,431.12

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Solution

The fourth proportional to 3,509.97, 5,267.98 and 1,431.12 is: 2,147.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,509.97 : 5,267.98 = 1,431.12 : x
  2. Step 2: Convert to fraction form
    3,509.97/5,267.98 = 1,431.12/x
  3. Step 3: Cross multiply
    3,509.97x = 5,267.98 × 1,431.12
  4. Step 4: Simplify right side
    3,509.97x = 7,539,085.20
  5. Step 5: Solve for x
    x = 7,539,085.20/3,509.97
  6. Step 6: Final answer
    x = 2,147.91

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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.