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Finding the Fourth Proportional to 218,750.40, 328,255.20 and 159,436.80

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Solution

The fourth proportional to 218,750.40, 328,255.20 and 159,436.80 is: 239,249.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,750.40 : 328,255.20 = 159,436.80 : x
  2. Step 2: Convert to fraction form
    218,750.40/328,255.20 = 159,436.80/x
  3. Step 3: Cross multiply
    218,750.40x = 328,255.20 × 159,436.80
  4. Step 4: Simplify right side
    218,750.40x = 52,335,958,671.36
  5. Step 5: Solve for x
    x = 52,335,958,671.36/218,750.40
  6. Step 6: Final answer
    x = 239,249.66

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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.