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Finding the Fourth Proportional to 625.83, 862.81 and 449.05

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Solution

The fourth proportional to 625.83, 862.81 and 449.05 is: 619.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.83 : 862.81 = 449.05 : x
  2. Step 2: Convert to fraction form
    625.83/862.81 = 449.05/x
  3. Step 3: Cross multiply
    625.83x = 862.81 × 449.05
  4. Step 4: Simplify right side
    625.83x = 387,441.55
  5. Step 5: Solve for x
    x = 387,441.55/625.83
  6. Step 6: Final answer
    x = 619.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.