Home / 389,983.50-538,084.80-226,542.78

Finding the Fourth Proportional to 389,983.50, 538,084.80 and 226,542.78

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Solution

The fourth proportional to 389,983.50, 538,084.80 and 226,542.78 is: 312,575.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,983.50 : 538,084.80 = 226,542.78 : x
  2. Step 2: Convert to fraction form
    389,983.50/538,084.80 = 226,542.78/x
  3. Step 3: Cross multiply
    389,983.50x = 538,084.80 × 226,542.78
  4. Step 4: Simplify right side
    389,983.50x = 121,899,226,467.74
  5. Step 5: Solve for x
    x = 121,899,226,467.74/389,983.50
  6. Step 6: Final answer
    x = 312,575.34

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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.