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Finding the Fourth Proportional to 4,754.40, 7,115.40 and 4,171.20

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Solution

The fourth proportional to 4,754.40, 7,115.40 and 4,171.20 is: 6,242.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,754.40 : 7,115.40 = 4,171.20 : x
  2. Step 2: Convert to fraction form
    4,754.40/7,115.40 = 4,171.20/x
  3. Step 3: Cross multiply
    4,754.40x = 7,115.40 × 4,171.20
  4. Step 4: Simplify right side
    4,754.40x = 29,679,756.48
  5. Step 5: Solve for x
    x = 29,679,756.48/4,754.40
  6. Step 6: Final answer
    x = 6,242.59

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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.