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Finding the Fourth Proportional to 3,124.80, 4,687.20 and 3,051.90

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Solution

The fourth proportional to 3,124.80, 4,687.20 and 3,051.90 is: 4,577.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.80 : 4,687.20 = 3,051.90 : x
  2. Step 2: Convert to fraction form
    3,124.80/4,687.20 = 3,051.90/x
  3. Step 3: Cross multiply
    3,124.80x = 4,687.20 × 3,051.90
  4. Step 4: Simplify right side
    3,124.80x = 14,304,865.68
  5. Step 5: Solve for x
    x = 14,304,865.68/3,124.80
  6. Step 6: Final answer
    x = 4,577.85

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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.