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Finding the Fourth Proportional to 1,063.28, 1,595.16 and 515.72

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Solution

The fourth proportional to 1,063.28, 1,595.16 and 515.72 is: 773.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,063.28 : 1,595.16 = 515.72 : x
  2. Step 2: Convert to fraction form
    1,063.28/1,595.16 = 515.72/x
  3. Step 3: Cross multiply
    1,063.28x = 1,595.16 × 515.72
  4. Step 4: Simplify right side
    1,063.28x = 822,659.90
  5. Step 5: Solve for x
    x = 822,659.90/1,063.28
  6. Step 6: Final answer
    x = 773.70

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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.