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Finding the Fourth Proportional to 512,367.93, 768,550.28 and 138,390.93

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Solution

The fourth proportional to 512,367.93, 768,550.28 and 138,390.93 is: 207,585.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,367.93 : 768,550.28 = 138,390.93 : x
  2. Step 2: Convert to fraction form
    512,367.93/768,550.28 = 138,390.93/x
  3. Step 3: Cross multiply
    512,367.93x = 768,550.28 × 138,390.93
  4. Step 4: Simplify right side
    512,367.93x = 106,360,387,309.01
  5. Step 5: Solve for x
    x = 106,360,387,309.01/512,367.93
  6. Step 6: Final answer
    x = 207,585.96

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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.