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Finding the Fourth Proportional to 418,645.22, 577,745.61 and 239,831.78

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Solution

The fourth proportional to 418,645.22, 577,745.61 and 239,831.78 is: 330,976.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    418,645.22 : 577,745.61 = 239,831.78 : x
  2. Step 2: Convert to fraction form
    418,645.22/577,745.61 = 239,831.78/x
  3. Step 3: Cross multiply
    418,645.22x = 577,745.61 × 239,831.78
  4. Step 4: Simplify right side
    418,645.22x = 138,561,758,033.49
  5. Step 5: Solve for x
    x = 138,561,758,033.49/418,645.22
  6. Step 6: Final answer
    x = 330,976.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.