Home / 438,976.38-658,397.25-139,418.22

Finding the Fourth Proportional to 438,976.38, 658,397.25 and 139,418.22

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Solution

The fourth proportional to 438,976.38, 658,397.25 and 139,418.22 is: 209,105.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,976.38 : 658,397.25 = 139,418.22 : x
  2. Step 2: Convert to fraction form
    438,976.38/658,397.25 = 139,418.22/x
  3. Step 3: Cross multiply
    438,976.38x = 658,397.25 × 139,418.22
  4. Step 4: Simplify right side
    438,976.38x = 91,792,572,647.90
  5. Step 5: Solve for x
    x = 91,792,572,647.90/438,976.38
  6. Step 6: Final answer
    x = 209,105.95

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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.