Home / 813,890.12-1,220,988.30-327,609.48

Finding the Fourth Proportional to 813,890.12, 1,220,988.30 and 327,609.48

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Solution

The fourth proportional to 813,890.12, 1,220,988.30 and 327,609.48 is: 491,475.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    813,890.12 : 1,220,988.30 = 327,609.48 : x
  2. Step 2: Convert to fraction form
    813,890.12/1,220,988.30 = 327,609.48/x
  3. Step 3: Cross multiply
    813,890.12x = 1,220,988.30 × 327,609.48
  4. Step 4: Simplify right side
    813,890.12x = 400,007,342,049.08
  5. Step 5: Solve for x
    x = 400,007,342,049.08/813,890.12
  6. Step 6: Final answer
    x = 491,475.85

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1.5x scale

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.