Home / 912,723.20-1,369,862.40-408,060.80

Finding the Fourth Proportional to 912,723.20, 1,369,862.40 and 408,060.80

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Solution

The fourth proportional to 912,723.20, 1,369,862.40 and 408,060.80 is: 612,438.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    912,723.20 : 1,369,862.40 = 408,060.80 : x
  2. Step 2: Convert to fraction form
    912,723.20/1,369,862.40 = 408,060.80/x
  3. Step 3: Cross multiply
    912,723.20x = 1,369,862.40 × 408,060.80
  4. Step 4: Simplify right side
    912,723.20x = 558,987,146,833.92
  5. Step 5: Solve for x
    x = 558,987,146,833.92/912,723.20
  6. Step 6: Final answer
    x = 612,438.85

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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.