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Finding the Fourth Proportional to 480.99, 721.33 and 172.76

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Solution

The fourth proportional to 480.99, 721.33 and 172.76 is: 259.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    480.99 : 721.33 = 172.76 : x
  2. Step 2: Convert to fraction form
    480.99/721.33 = 172.76/x
  3. Step 3: Cross multiply
    480.99x = 721.33 × 172.76
  4. Step 4: Simplify right side
    480.99x = 124,615.45
  5. Step 5: Solve for x
    x = 124,615.45/480.99
  6. Step 6: Final answer
    x = 259.08

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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.