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Finding the Fourth Proportional to 626.77, 865.81 and 440.20

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Solution

The fourth proportional to 626.77, 865.81 and 440.20 is: 608.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.77 : 865.81 = 440.20 : x
  2. Step 2: Convert to fraction form
    626.77/865.81 = 440.20/x
  3. Step 3: Cross multiply
    626.77x = 865.81 × 440.20
  4. Step 4: Simplify right side
    626.77x = 381,129.56
  5. Step 5: Solve for x
    x = 381,129.56/626.77
  6. Step 6: Final answer
    x = 608.09

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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.