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Finding the Fourth Proportional to 178.20, 244.80 and 145.35

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Solution

The fourth proportional to 178.20, 244.80 and 145.35 is: 199.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    178.20 : 244.80 = 145.35 : x
  2. Step 2: Convert to fraction form
    178.20/244.80 = 145.35/x
  3. Step 3: Cross multiply
    178.20x = 244.80 × 145.35
  4. Step 4: Simplify right side
    178.20x = 35,581.68
  5. Step 5: Solve for x
    x = 35,581.68/178.20
  6. Step 6: Final answer
    x = 199.67

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.