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Finding the Fourth Proportional to 625.59, 863.60 and 401.86

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Solution

The fourth proportional to 625.59, 863.60 and 401.86 is: 554.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.59 : 863.60 = 401.86 : x
  2. Step 2: Convert to fraction form
    625.59/863.60 = 401.86/x
  3. Step 3: Cross multiply
    625.59x = 863.60 × 401.86
  4. Step 4: Simplify right side
    625.59x = 347,043.52
  5. Step 5: Solve for x
    x = 347,043.52/625.59
  6. Step 6: Final answer
    x = 554.74

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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.