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Finding the Fourth Proportional to 245.79, 366.80 and 219.85

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Solution

The fourth proportional to 245.79, 366.80 and 219.85 is: 328.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    245.79 : 366.80 = 219.85 : x
  2. Step 2: Convert to fraction form
    245.79/366.80 = 219.85/x
  3. Step 3: Cross multiply
    245.79x = 366.80 × 219.85
  4. Step 4: Simplify right side
    245.79x = 80,638.96
  5. Step 5: Solve for x
    x = 80,638.96/245.79
  6. Step 6: Final answer
    x = 328.08

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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.