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Finding the Fourth Proportional to 625.37, 862.83 and 401.45

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Solution

The fourth proportional to 625.37, 862.83 and 401.45 is: 553.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    625.37 : 862.83 = 401.45 : x
  2. Step 2: Convert to fraction form
    625.37/862.83 = 401.45/x
  3. Step 3: Cross multiply
    625.37x = 862.83 × 401.45
  4. Step 4: Simplify right side
    625.37x = 346,378.79
  5. Step 5: Solve for x
    x = 346,378.79/625.37
  6. Step 6: Final answer
    x = 553.88

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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.