Home / 820,904.40-1,231,479.72-288,331.56

Finding the Fourth Proportional to 820,904.40, 1,231,479.72 and 288,331.56

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Solution

The fourth proportional to 820,904.40, 1,231,479.72 and 288,331.56 is: 432,540.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    820,904.40 : 1,231,479.72 = 288,331.56 : x
  2. Step 2: Convert to fraction form
    820,904.40/1,231,479.72 = 288,331.56/x
  3. Step 3: Cross multiply
    820,904.40x = 1,231,479.72 × 288,331.56
  4. Step 4: Simplify right side
    820,904.40x = 355,074,468,775.96
  5. Step 5: Solve for x
    x = 355,074,468,775.96/820,904.40
  6. Step 6: Final answer
    x = 432,540.58

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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.