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Finding the Fourth Proportional to 520,042.20, 780,136.20 and 204,425.70

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Solution

The fourth proportional to 520,042.20, 780,136.20 and 204,425.70 is: 306,667.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,042.20 : 780,136.20 = 204,425.70 : x
  2. Step 2: Convert to fraction form
    520,042.20/780,136.20 = 204,425.70/x
  3. Step 3: Cross multiply
    520,042.20x = 780,136.20 × 204,425.70
  4. Step 4: Simplify right side
    520,042.20x = 159,479,888,780.34
  5. Step 5: Solve for x
    x = 159,479,888,780.34/520,042.20
  6. Step 6: Final answer
    x = 306,667.21

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1.5x scale

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.