Home / 513,297.20-769,945.80-139,320.20

Finding the Fourth Proportional to 513,297.20, 769,945.80 and 139,320.20

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Solution

The fourth proportional to 513,297.20, 769,945.80 and 139,320.20 is: 208,980.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,297.20 : 769,945.80 = 139,320.20 : x
  2. Step 2: Convert to fraction form
    513,297.20/769,945.80 = 139,320.20/x
  3. Step 3: Cross multiply
    513,297.20x = 769,945.80 × 139,320.20
  4. Step 4: Simplify right side
    513,297.20x = 107,268,998,995.43
  5. Step 5: Solve for x
    x = 107,268,998,995.43/513,297.20
  6. Step 6: Final answer
    x = 208,980.29

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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.