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Finding the Fourth Proportional to 625.45, 862.63 and 404.46

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Solution

The fourth proportional to 625.45, 862.63 and 404.46 is: 557.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.45 : 862.63 = 404.46 : x
  2. Step 2: Convert to fraction form
    625.45/862.63 = 404.46/x
  3. Step 3: Cross multiply
    625.45x = 862.63 × 404.46
  4. Step 4: Simplify right side
    625.45x = 348,899.33
  5. Step 5: Solve for x
    x = 348,899.33/625.45
  6. Step 6: Final answer
    x = 557.84

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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.