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Finding the Fourth Proportional to 3,101.80, 4,651.80 and 1,127.20

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Solution

The fourth proportional to 3,101.80, 4,651.80 and 1,127.20 is: 1,690.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,101.80 : 4,651.80 = 1,127.20 : x
  2. Step 2: Convert to fraction form
    3,101.80/4,651.80 = 1,127.20/x
  3. Step 3: Cross multiply
    3,101.80x = 4,651.80 × 1,127.20
  4. Step 4: Simplify right side
    3,101.80x = 5,243,508.96
  5. Step 5: Solve for x
    x = 5,243,508.96/3,101.80
  6. Step 6: Final answer
    x = 1,690.47

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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.