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Finding the Fourth Proportional to 2,421.82, 3,633.18 and 862.75

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Solution

The fourth proportional to 2,421.82, 3,633.18 and 862.75 is: 1,294.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,421.82 : 3,633.18 = 862.75 : x
  2. Step 2: Convert to fraction form
    2,421.82/3,633.18 = 862.75/x
  3. Step 3: Cross multiply
    2,421.82x = 3,633.18 × 862.75
  4. Step 4: Simplify right side
    2,421.82x = 3,134,526.05
  5. Step 5: Solve for x
    x = 3,134,526.05/2,421.82
  6. Step 6: Final answer
    x = 1,294.29

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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.