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Finding the Fourth Proportional to 218,881.20, 328,321.80 and 190,012.80

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Solution

The fourth proportional to 218,881.20, 328,321.80 and 190,012.80 is: 285,019.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,881.20 : 328,321.80 = 190,012.80 : x
  2. Step 2: Convert to fraction form
    218,881.20/328,321.80 = 190,012.80/x
  3. Step 3: Cross multiply
    218,881.20x = 328,321.80 × 190,012.80
  4. Step 4: Simplify right side
    218,881.20x = 62,385,344,519.04
  5. Step 5: Solve for x
    x = 62,385,344,519.04/218,881.20
  6. Step 6: Final answer
    x = 285,019.20

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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.