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Finding the Fourth Proportional to 478.97, 660.84 and 282.41

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Solution

The fourth proportional to 478.97, 660.84 and 282.41 is: 389.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.97 : 660.84 = 282.41 : x
  2. Step 2: Convert to fraction form
    478.97/660.84 = 282.41/x
  3. Step 3: Cross multiply
    478.97x = 660.84 × 282.41
  4. Step 4: Simplify right side
    478.97x = 186,627.82
  5. Step 5: Solve for x
    x = 186,627.82/478.97
  6. Step 6: Final answer
    x = 389.64

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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.