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Finding the Fourth Proportional to 474.33, 654.29 and 287.72

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Solution

The fourth proportional to 474.33, 654.29 and 287.72 is: 396.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    474.33 : 654.29 = 287.72 : x
  2. Step 2: Convert to fraction form
    474.33/654.29 = 287.72/x
  3. Step 3: Cross multiply
    474.33x = 654.29 × 287.72
  4. Step 4: Simplify right side
    474.33x = 188,253.59
  5. Step 5: Solve for x
    x = 188,253.59/474.33
  6. Step 6: Final answer
    x = 396.89

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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.