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Finding the Fourth Proportional to 1,861.72, 2,793.10 and 563.20

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Solution

The fourth proportional to 1,861.72, 2,793.10 and 563.20 is: 844.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,861.72 : 2,793.10 = 563.20 : x
  2. Step 2: Convert to fraction form
    1,861.72/2,793.10 = 563.20/x
  3. Step 3: Cross multiply
    1,861.72x = 2,793.10 × 563.20
  4. Step 4: Simplify right side
    1,861.72x = 1,573,073.92
  5. Step 5: Solve for x
    x = 1,573,073.92/1,861.72
  6. Step 6: Final answer
    x = 844.96

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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.