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Finding the Fourth Proportional to 478.80, 716.39 and 283.91

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Solution

The fourth proportional to 478.80, 716.39 and 283.91 is: 424.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    478.80 : 716.39 = 283.91 : x
  2. Step 2: Convert to fraction form
    478.80/716.39 = 283.91/x
  3. Step 3: Cross multiply
    478.80x = 716.39 × 283.91
  4. Step 4: Simplify right side
    478.80x = 203,385.28
  5. Step 5: Solve for x
    x = 203,385.28/478.80
  6. Step 6: Final answer
    x = 424.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.