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Finding the Fourth Proportional to 391,088.97, 539,710.44 and 255,209.85

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Solution

The fourth proportional to 391,088.97, 539,710.44 and 255,209.85 is: 352,194.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,088.97 : 539,710.44 = 255,209.85 : x
  2. Step 2: Convert to fraction form
    391,088.97/539,710.44 = 255,209.85/x
  3. Step 3: Cross multiply
    391,088.97x = 539,710.44 × 255,209.85
  4. Step 4: Simplify right side
    391,088.97x = 137,739,420,435.83
  5. Step 5: Solve for x
    x = 137,739,420,435.83/391,088.97
  6. Step 6: Final answer
    x = 352,194.59

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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.