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Finding the Fourth Proportional to 520,363.20, 780,617.70 and 220,841.40

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Solution

The fourth proportional to 520,363.20, 780,617.70 and 220,841.40 is: 331,293.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,363.20 : 780,617.70 = 220,841.40 : x
  2. Step 2: Convert to fraction form
    520,363.20/780,617.70 = 220,841.40/x
  3. Step 3: Cross multiply
    520,363.20x = 780,617.70 × 220,841.40
  4. Step 4: Simplify right side
    520,363.20x = 172,392,705,732.78
  5. Step 5: Solve for x
    x = 172,392,705,732.78/520,363.20
  6. Step 6: Final answer
    x = 331,293.04

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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.