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Finding the Fourth Proportional to 399,322.04, 551,060.18 and 218,033.40

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Solution

The fourth proportional to 399,322.04, 551,060.18 and 218,033.40 is: 300,883.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,322.04 : 551,060.18 = 218,033.40 : x
  2. Step 2: Convert to fraction form
    399,322.04/551,060.18 = 218,033.40/x
  3. Step 3: Cross multiply
    399,322.04x = 551,060.18 × 218,033.40
  4. Step 4: Simplify right side
    399,322.04x = 120,149,524,650.01
  5. Step 5: Solve for x
    x = 120,149,524,650.01/399,322.04
  6. Step 6: Final answer
    x = 300,883.78

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.