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Finding the Fourth Proportional to 218,864.80, 328,297.20 and 192,620.80

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Solution

The fourth proportional to 218,864.80, 328,297.20 and 192,620.80 is: 288,931.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,864.80 : 328,297.20 = 192,620.80 : x
  2. Step 2: Convert to fraction form
    218,864.80/328,297.20 = 192,620.80/x
  3. Step 3: Cross multiply
    218,864.80x = 328,297.20 × 192,620.80
  4. Step 4: Simplify right side
    218,864.80x = 63,236,869,301.76
  5. Step 5: Solve for x
    x = 63,236,869,301.76/218,864.80
  6. Step 6: Final answer
    x = 288,931.20

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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.