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Finding the Fourth Proportional to 626.33, 864.47 and 479.32

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Solution

The fourth proportional to 626.33, 864.47 and 479.32 is: 661.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    626.33 : 864.47 = 479.32 : x
  2. Step 2: Convert to fraction form
    626.33/864.47 = 479.32/x
  3. Step 3: Cross multiply
    626.33x = 864.47 × 479.32
  4. Step 4: Simplify right side
    626.33x = 414,356.80
  5. Step 5: Solve for x
    x = 414,356.80/626.33
  6. Step 6: Final answer
    x = 661.56

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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.