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Finding the Fourth Proportional to 1,562.55, 2,156.23 and 863.88

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Solution

The fourth proportional to 1,562.55, 2,156.23 and 863.88 is: 1,192.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.55 : 2,156.23 = 863.88 : x
  2. Step 2: Convert to fraction form
    1,562.55/2,156.23 = 863.88/x
  3. Step 3: Cross multiply
    1,562.55x = 2,156.23 × 863.88
  4. Step 4: Simplify right side
    1,562.55x = 1,862,723.97
  5. Step 5: Solve for x
    x = 1,862,723.97/1,562.55
  6. Step 6: Final answer
    x = 1,192.11

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.