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Finding the Fourth Proportional to 1,562.29, 2,155.96 and 863.67

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Solution

The fourth proportional to 1,562.29, 2,155.96 and 863.67 is: 1,191.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,562.29 : 2,155.96 = 863.67 : x
  2. Step 2: Convert to fraction form
    1,562.29/2,155.96 = 863.67/x
  3. Step 3: Cross multiply
    1,562.29x = 2,155.96 × 863.67
  4. Step 4: Simplify right side
    1,562.29x = 1,862,037.97
  5. Step 5: Solve for x
    x = 1,862,037.97/1,562.29
  6. Step 6: Final answer
    x = 1,191.86

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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.