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Finding the Fourth Proportional to 381,355.20, 572,032.80 and 223,891.20

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Solution

The fourth proportional to 381,355.20, 572,032.80 and 223,891.20 is: 335,836.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,355.20 : 572,032.80 = 223,891.20 : x
  2. Step 2: Convert to fraction form
    381,355.20/572,032.80 = 223,891.20/x
  3. Step 3: Cross multiply
    381,355.20x = 572,032.80 × 223,891.20
  4. Step 4: Simplify right side
    381,355.20x = 128,073,110,031.36
  5. Step 5: Solve for x
    x = 128,073,110,031.36/381,355.20
  6. Step 6: Final answer
    x = 335,836.80

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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.