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Finding the Fourth Proportional to 625.60, 863.38 and 345.85

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Solution

The fourth proportional to 625.60, 863.38 and 345.85 is: 477.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.60 : 863.38 = 345.85 : x
  2. Step 2: Convert to fraction form
    625.60/863.38 = 345.85/x
  3. Step 3: Cross multiply
    625.60x = 863.38 × 345.85
  4. Step 4: Simplify right side
    625.60x = 298,598.25
  5. Step 5: Solve for x
    x = 298,598.25/625.60
  6. Step 6: Final answer
    x = 477.30

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1.5x scale

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.