Home / 378,086.31-521,734.68-225,135.72

Finding the Fourth Proportional to 378,086.31, 521,734.68 and 225,135.72

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Solution

The fourth proportional to 378,086.31, 521,734.68 and 225,135.72 is: 310,672.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    378,086.31 : 521,734.68 = 225,135.72 : x
  2. Step 2: Convert to fraction form
    378,086.31/521,734.68 = 225,135.72/x
  3. Step 3: Cross multiply
    378,086.31x = 521,734.68 × 225,135.72
  4. Step 4: Simplify right side
    378,086.31x = 117,461,112,830.77
  5. Step 5: Solve for x
    x = 117,461,112,830.77/378,086.31
  6. Step 6: Final answer
    x = 310,672.75

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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.