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Finding the Fourth Proportional to 626.50, 864.48 and 440.56

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Solution

The fourth proportional to 626.50, 864.48 and 440.56 is: 607.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.50 : 864.48 = 440.56 : x
  2. Step 2: Convert to fraction form
    626.50/864.48 = 440.56/x
  3. Step 3: Cross multiply
    626.50x = 864.48 × 440.56
  4. Step 4: Simplify right side
    626.50x = 380,855.31
  5. Step 5: Solve for x
    x = 380,855.31/626.50
  6. Step 6: Final answer
    x = 607.91

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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.