Home / 643,029.30-887,337.18-356,538.78

Finding the Fourth Proportional to 643,029.30, 887,337.18 and 356,538.78

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Solution

The fourth proportional to 643,029.30, 887,337.18 and 356,538.78 is: 491,999.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,029.30 : 887,337.18 = 356,538.78 : x
  2. Step 2: Convert to fraction form
    643,029.30/887,337.18 = 356,538.78/x
  3. Step 3: Cross multiply
    643,029.30x = 887,337.18 × 356,538.78
  4. Step 4: Simplify right side
    643,029.30x = 316,370,115,605.84
  5. Step 5: Solve for x
    x = 316,370,115,605.84/643,029.30
  6. Step 6: Final answer
    x = 491,999.53

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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.