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Finding the Fourth Proportional to 625.47, 863.12 and 345.69

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Solution

The fourth proportional to 625.47, 863.12 and 345.69 is: 477.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.47 : 863.12 = 345.69 : x
  2. Step 2: Convert to fraction form
    625.47/863.12 = 345.69/x
  3. Step 3: Cross multiply
    625.47x = 863.12 × 345.69
  4. Step 4: Simplify right side
    625.47x = 298,372.82
  5. Step 5: Solve for x
    x = 298,372.82/625.47
  6. Step 6: Final answer
    x = 477.04

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Half scale
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Double scale
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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.