Home / 386,422.80-579,634.20-137,072.40

Finding the Fourth Proportional to 386,422.80, 579,634.20 and 137,072.40

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Solution

The fourth proportional to 386,422.80, 579,634.20 and 137,072.40 is: 205,608.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,422.80 : 579,634.20 = 137,072.40 : x
  2. Step 2: Convert to fraction form
    386,422.80/579,634.20 = 137,072.40/x
  3. Step 3: Cross multiply
    386,422.80x = 579,634.20 × 137,072.40
  4. Step 4: Simplify right side
    386,422.80x = 79,451,850,916.08
  5. Step 5: Solve for x
    x = 79,451,850,916.08/386,422.80
  6. Step 6: Final answer
    x = 205,608.60

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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.