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Finding the Fourth Proportional to 2,672.80, 4,005.60 and 1,132

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Solution

The fourth proportional to 2,672.80, 4,005.60 and 1,132 is: 1,696.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,672.80 : 4,005.60 = 1,132 : x
  2. Step 2: Convert to fraction form
    2,672.80/4,005.60 = 1,132/x
  3. Step 3: Cross multiply
    2,672.80x = 4,005.60 × 1,132
  4. Step 4: Simplify right side
    2,672.80x = 4,534,339.20
  5. Step 5: Solve for x
    x = 4,534,339.20/2,672.80
  6. Step 6: Final answer
    x = 1,696.48

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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.