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Finding the Fourth Proportional to 381,069.80, 571,604.70 and 239,352.20

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Solution

The fourth proportional to 381,069.80, 571,604.70 and 239,352.20 is: 359,028.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    381,069.80 : 571,604.70 = 239,352.20 : x
  2. Step 2: Convert to fraction form
    381,069.80/571,604.70 = 239,352.20/x
  3. Step 3: Cross multiply
    381,069.80x = 571,604.70 × 239,352.20
  4. Step 4: Simplify right side
    381,069.80x = 136,814,842,475.34
  5. Step 5: Solve for x
    x = 136,814,842,475.34/381,069.80
  6. Step 6: Final answer
    x = 359,028.30

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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.