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Finding the Fourth Proportional to 218,843.60, 328,265.40 and 140,046.80

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Solution

The fourth proportional to 218,843.60, 328,265.40 and 140,046.80 is: 210,070.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,843.60 : 328,265.40 = 140,046.80 : x
  2. Step 2: Convert to fraction form
    218,843.60/328,265.40 = 140,046.80/x
  3. Step 3: Cross multiply
    218,843.60x = 328,265.40 × 140,046.80
  4. Step 4: Simplify right side
    218,843.60x = 45,972,518,820.72
  5. Step 5: Solve for x
    x = 45,972,518,820.72/218,843.60
  6. Step 6: Final answer
    x = 210,070.20

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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.