Home / 513,315.20-769,972.79-139,338.20

Finding the Fourth Proportional to 513,315.20, 769,972.79 and 139,338.20

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Solution

The fourth proportional to 513,315.20, 769,972.79 and 139,338.20 is: 209,007.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,315.20 : 769,972.79 = 139,338.20 : x
  2. Step 2: Convert to fraction form
    513,315.20/769,972.79 = 139,338.20/x
  3. Step 3: Cross multiply
    513,315.20x = 769,972.79 × 139,338.20
  4. Step 4: Simplify right side
    513,315.20x = 107,286,618,061.02
  5. Step 5: Solve for x
    x = 107,286,618,061.02/513,315.20
  6. Step 6: Final answer
    x = 209,007.29

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Similar ratio
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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.