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Finding the Fourth Proportional to 4,757.55, 7,139.55 and 1,679.55

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Solution

The fourth proportional to 4,757.55, 7,139.55 and 1,679.55 is: 2,520.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,757.55 : 7,139.55 = 1,679.55 : x
  2. Step 2: Convert to fraction form
    4,757.55/7,139.55 = 1,679.55/x
  3. Step 3: Cross multiply
    4,757.55x = 7,139.55 × 1,679.55
  4. Step 4: Simplify right side
    4,757.55x = 11,991,231.20
  5. Step 5: Solve for x
    x = 11,991,231.20/4,757.55
  6. Step 6: Final answer
    x = 2,520.46

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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.