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Finding the Fourth Proportional to 479.97, 662.40 and 283.53

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Solution

The fourth proportional to 479.97, 662.40 and 283.53 is: 391.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.97 : 662.40 = 283.53 : x
  2. Step 2: Convert to fraction form
    479.97/662.40 = 283.53/x
  3. Step 3: Cross multiply
    479.97x = 662.40 × 283.53
  4. Step 4: Simplify right side
    479.97x = 187,810.27
  5. Step 5: Solve for x
    x = 187,810.27/479.97
  6. Step 6: Final answer
    x = 391.30

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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.