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Finding the Fourth Proportional to 520,200.55, 780,300.83 and 489,096.55

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Solution

The fourth proportional to 520,200.55, 780,300.83 and 489,096.55 is: 733,644.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,200.55 : 780,300.83 = 489,096.55 : x
  2. Step 2: Convert to fraction form
    520,200.55/780,300.83 = 489,096.55/x
  3. Step 3: Cross multiply
    520,200.55x = 780,300.83 × 489,096.55
  4. Step 4: Simplify right side
    520,200.55x = 381,642,441,469.65
  5. Step 5: Solve for x
    x = 381,642,441,469.65/520,200.55
  6. Step 6: Final answer
    x = 733,644.83

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Similar ratio
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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.