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Finding the Fourth Proportional to 626.62, 864.39 and 440.40

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Solution

The fourth proportional to 626.62, 864.39 and 440.40 is: 607.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.62 : 864.39 = 440.40 : x
  2. Step 2: Convert to fraction form
    626.62/864.39 = 440.40/x
  3. Step 3: Cross multiply
    626.62x = 864.39 × 440.40
  4. Step 4: Simplify right side
    626.62x = 380,677.36
  5. Step 5: Solve for x
    x = 380,677.36/626.62
  6. Step 6: Final answer
    x = 607.51

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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.