Home / 643,173.38-965,338.31-343,909.76

Finding the Fourth Proportional to 643,173.38, 965,338.31 and 343,909.76

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Solution

The fourth proportional to 643,173.38, 965,338.31 and 343,909.76 is: 516,173.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    643,173.38 : 965,338.31 = 343,909.76 : x
  2. Step 2: Convert to fraction form
    643,173.38/965,338.31 = 343,909.76/x
  3. Step 3: Cross multiply
    643,173.38x = 965,338.31 × 343,909.76
  4. Step 4: Simplify right side
    643,173.38x = 331,989,266,510.91
  5. Step 5: Solve for x
    x = 331,989,266,510.91/643,173.38
  6. Step 6: Final answer
    x = 516,173.83

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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.