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Finding the Fourth Proportional to 480.15, 662.58 and 283.68

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Solution

The fourth proportional to 480.15, 662.58 and 283.68 is: 391.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.15 : 662.58 = 283.68 : x
  2. Step 2: Convert to fraction form
    480.15/662.58 = 283.68/x
  3. Step 3: Cross multiply
    480.15x = 662.58 × 283.68
  4. Step 4: Simplify right side
    480.15x = 187,960.69
  5. Step 5: Solve for x
    x = 187,960.69/480.15
  6. Step 6: Final answer
    x = 391.46

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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.