Home / 386,488.80-579,733.20-137,138.40

Finding the Fourth Proportional to 386,488.80, 579,733.20 and 137,138.40

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Solution

The fourth proportional to 386,488.80, 579,733.20 and 137,138.40 is: 205,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,488.80 : 579,733.20 = 137,138.40 : x
  2. Step 2: Convert to fraction form
    386,488.80/579,733.20 = 137,138.40/x
  3. Step 3: Cross multiply
    386,488.80x = 579,733.20 × 137,138.40
  4. Step 4: Simplify right side
    386,488.80x = 79,503,683,474.88
  5. Step 5: Solve for x
    x = 79,503,683,474.88/386,488.80
  6. Step 6: Final answer
    x = 205,707.60

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Similar ratio
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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.