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Finding the Fourth Proportional to 5,280.85, 7,921.80 and 2,506.85

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Solution

The fourth proportional to 5,280.85, 7,921.80 and 2,506.85 is: 3,760.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,280.85 : 7,921.80 = 2,506.85 : x
  2. Step 2: Convert to fraction form
    5,280.85/7,921.80 = 2,506.85/x
  3. Step 3: Cross multiply
    5,280.85x = 7,921.80 × 2,506.85
  4. Step 4: Simplify right side
    5,280.85x = 19,858,754.43
  5. Step 5: Solve for x
    x = 19,858,754.43/5,280.85
  6. Step 6: Final answer
    x = 3,760.53

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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.