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Finding the Fourth Proportional to 259,279.60, 388,919.40 and 141,314.80

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Solution

The fourth proportional to 259,279.60, 388,919.40 and 141,314.80 is: 211,972.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    259,279.60 : 388,919.40 = 141,314.80 : x
  2. Step 2: Convert to fraction form
    259,279.60/388,919.40 = 141,314.80/x
  3. Step 3: Cross multiply
    259,279.60x = 388,919.40 × 141,314.80
  4. Step 4: Simplify right side
    259,279.60x = 54,960,067,227.12
  5. Step 5: Solve for x
    x = 54,960,067,227.12/259,279.60
  6. Step 6: Final answer
    x = 211,972.20

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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.