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Finding the Fourth Proportional to 2,082.76, 3,124.68 and 621.88

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Solution

The fourth proportional to 2,082.76, 3,124.68 and 621.88 is: 932.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,082.76 : 3,124.68 = 621.88 : x
  2. Step 2: Convert to fraction form
    2,082.76/3,124.68 = 621.88/x
  3. Step 3: Cross multiply
    2,082.76x = 3,124.68 × 621.88
  4. Step 4: Simplify right side
    2,082.76x = 1,943,176.00
  5. Step 5: Solve for x
    x = 1,943,176.00/2,082.76
  6. Step 6: Final answer
    x = 932.98

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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.