Home / 820,620.46-1,231,468.92-288,127.78

Finding the Fourth Proportional to 820,620.46, 1,231,468.92 and 288,127.78

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Solution

The fourth proportional to 820,620.46, 1,231,468.92 and 288,127.78 is: 432,380.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,620.46 : 1,231,468.92 = 288,127.78 : x
  2. Step 2: Convert to fraction form
    820,620.46/1,231,468.92 = 288,127.78/x
  3. Step 3: Cross multiply
    820,620.46x = 1,231,468.92 × 288,127.78
  4. Step 4: Simplify right side
    820,620.46x = 354,820,406,058.60
  5. Step 5: Solve for x
    x = 354,820,406,058.60/820,620.46
  6. Step 6: Final answer
    x = 432,380.65

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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.