Home / 513,285-769,914.54-139,298.28

Finding the Fourth Proportional to 513,285, 769,914.54 and 139,298.28

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Solution

The fourth proportional to 513,285, 769,914.54 and 139,298.28 is: 208,943.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,285 : 769,914.54 = 139,298.28 : x
  2. Step 2: Convert to fraction form
    513,285/769,914.54 = 139,298.28/x
  3. Step 3: Cross multiply
    513,285x = 769,914.54 × 139,298.28
  4. Step 4: Simplify right side
    513,285x = 107,247,771,168.99
  5. Step 5: Solve for x
    x = 107,247,771,168.99/513,285
  6. Step 6: Final answer
    x = 208,943.90

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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.