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Finding the Fourth Proportional to 4,761.72, 7,142.16 and 1,839.24

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Solution

The fourth proportional to 4,761.72, 7,142.16 and 1,839.24 is: 2,758.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,761.72 : 7,142.16 = 1,839.24 : x
  2. Step 2: Convert to fraction form
    4,761.72/7,142.16 = 1,839.24/x
  3. Step 3: Cross multiply
    4,761.72x = 7,142.16 × 1,839.24
  4. Step 4: Simplify right side
    4,761.72x = 13,136,146.36
  5. Step 5: Solve for x
    x = 13,136,146.36/4,761.72
  6. Step 6: Final answer
    x = 2,758.70

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1.5x scale

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.