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Finding the Fourth Proportional to 513,859.20, 770,788.80 and 218,332.80

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Solution

The fourth proportional to 513,859.20, 770,788.80 and 218,332.80 is: 327,499.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,859.20 : 770,788.80 = 218,332.80 : x
  2. Step 2: Convert to fraction form
    513,859.20/770,788.80 = 218,332.80/x
  3. Step 3: Cross multiply
    513,859.20x = 770,788.80 × 218,332.80
  4. Step 4: Simplify right side
    513,859.20x = 168,288,476,912.64
  5. Step 5: Solve for x
    x = 168,288,476,912.64/513,859.20
  6. Step 6: Final answer
    x = 327,499.20

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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.