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Finding the Fourth Proportional to 1,563.88, 2,348.12 and 871.90

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Solution

The fourth proportional to 1,563.88, 2,348.12 and 871.90 is: 1,309.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.88 : 2,348.12 = 871.90 : x
  2. Step 2: Convert to fraction form
    1,563.88/2,348.12 = 871.90/x
  3. Step 3: Cross multiply
    1,563.88x = 2,348.12 × 871.90
  4. Step 4: Simplify right side
    1,563.88x = 2,047,315.35
  5. Step 5: Solve for x
    x = 2,047,315.35/1,563.88
  6. Step 6: Final answer
    x = 1,309.13

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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.