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Finding the Fourth Proportional to 1,909.52, 2,862.32 and 813.32

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Solution

The fourth proportional to 1,909.52, 2,862.32 and 813.32 is: 1,219.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,909.52 : 2,862.32 = 813.32 : x
  2. Step 2: Convert to fraction form
    1,909.52/2,862.32 = 813.32/x
  3. Step 3: Cross multiply
    1,909.52x = 2,862.32 × 813.32
  4. Step 4: Simplify right side
    1,909.52x = 2,327,982.10
  5. Step 5: Solve for x
    x = 2,327,982.10/1,909.52
  6. Step 6: Final answer
    x = 1,219.15

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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.