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Finding the Fourth Proportional to 625,868.39, 863,703.79 and 339,388.49

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Solution

The fourth proportional to 625,868.39, 863,703.79 and 339,388.49 is: 468,359.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    625,868.39 : 863,703.79 = 339,388.49 : x
  2. Step 2: Convert to fraction form
    625,868.39/863,703.79 = 339,388.49/x
  3. Step 3: Cross multiply
    625,868.39x = 863,703.79 × 339,388.49
  4. Step 4: Simplify right side
    625,868.39x = 293,131,126,406.17
  5. Step 5: Solve for x
    x = 293,131,126,406.17/625,868.39
  6. Step 6: Final answer
    x = 468,359.05

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.