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Finding the Fourth Proportional to 625.61, 863.28 and 345.83

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Solution

The fourth proportional to 625.61, 863.28 and 345.83 is: 477.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.61 : 863.28 = 345.83 : x
  2. Step 2: Convert to fraction form
    625.61/863.28 = 345.83/x
  3. Step 3: Cross multiply
    625.61x = 863.28 × 345.83
  4. Step 4: Simplify right side
    625.61x = 298,543.81
  5. Step 5: Solve for x
    x = 298,543.81/625.61
  6. Step 6: Final answer
    x = 477.21

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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.