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Finding the Fourth Proportional to 242,639.70, 363,959.55 and 218,145.30

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Solution

The fourth proportional to 242,639.70, 363,959.55 and 218,145.30 is: 327,217.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    242,639.70 : 363,959.55 = 218,145.30 : x
  2. Step 2: Convert to fraction form
    242,639.70/363,959.55 = 218,145.30/x
  3. Step 3: Cross multiply
    242,639.70x = 363,959.55 × 218,145.30
  4. Step 4: Simplify right side
    242,639.70x = 79,396,065,222.62
  5. Step 5: Solve for x
    x = 79,396,065,222.62/242,639.70
  6. Step 6: Final answer
    x = 327,217.95

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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.