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Finding the Fourth Proportional to 438,604.80, 656,740.80 and 279,974.40

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Solution

The fourth proportional to 438,604.80, 656,740.80 and 279,974.40 is: 419,217.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,604.80 : 656,740.80 = 279,974.40 : x
  2. Step 2: Convert to fraction form
    438,604.80/656,740.80 = 279,974.40/x
  3. Step 3: Cross multiply
    438,604.80x = 656,740.80 × 279,974.40
  4. Step 4: Simplify right side
    438,604.80x = 183,870,611,435.52
  5. Step 5: Solve for x
    x = 183,870,611,435.52/438,604.80
  6. Step 6: Final answer
    x = 419,217.05

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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.