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Finding the Fourth Proportional to 173.20, 258.88 and 145.92

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Solution

The fourth proportional to 173.20, 258.88 and 145.92 is: 218.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    173.20 : 258.88 = 145.92 : x
  2. Step 2: Convert to fraction form
    173.20/258.88 = 145.92/x
  3. Step 3: Cross multiply
    173.20x = 258.88 × 145.92
  4. Step 4: Simplify right side
    173.20x = 37,775.77
  5. Step 5: Solve for x
    x = 37,775.77/173.20
  6. Step 6: Final answer
    x = 218.10

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.