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Finding the Fourth Proportional to 626.70, 865.38 and 440.61

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Solution

The fourth proportional to 626.70, 865.38 and 440.61 is: 608.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.70 : 865.38 = 440.61 : x
  2. Step 2: Convert to fraction form
    626.70/865.38 = 440.61/x
  3. Step 3: Cross multiply
    626.70x = 865.38 × 440.61
  4. Step 4: Simplify right side
    626.70x = 381,293.49
  5. Step 5: Solve for x
    x = 381,293.49/626.70
  6. Step 6: Final answer
    x = 608.41

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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.