Home / 429,538.40-643,360.20-269,091.92

Finding the Fourth Proportional to 429,538.40, 643,360.20 and 269,091.92

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Solution

The fourth proportional to 429,538.40, 643,360.20 and 269,091.92 is: 403,044.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,538.40 : 643,360.20 = 269,091.92 : x
  2. Step 2: Convert to fraction form
    429,538.40/643,360.20 = 269,091.92/x
  3. Step 3: Cross multiply
    429,538.40x = 643,360.20 × 269,091.92
  4. Step 4: Simplify right side
    429,538.40x = 173,123,031,469.58
  5. Step 5: Solve for x
    x = 173,123,031,469.58/429,538.40
  6. Step 6: Final answer
    x = 403,044.36

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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.