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Finding the Fourth Proportional to 480.59, 720.89 and 172.46

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Solution

The fourth proportional to 480.59, 720.89 and 172.46 is: 258.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.59 : 720.89 = 172.46 : x
  2. Step 2: Convert to fraction form
    480.59/720.89 = 172.46/x
  3. Step 3: Cross multiply
    480.59x = 720.89 × 172.46
  4. Step 4: Simplify right side
    480.59x = 124,324.69
  5. Step 5: Solve for x
    x = 124,324.69/480.59
  6. Step 6: Final answer
    x = 258.69

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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.