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Finding the Fourth Proportional to 218,651.51, 328,003.53 and 206,694.08

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Solution

The fourth proportional to 218,651.51, 328,003.53 and 206,694.08 is: 310,065.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,651.51 : 328,003.53 = 206,694.08 : x
  2. Step 2: Convert to fraction form
    218,651.51/328,003.53 = 206,694.08/x
  3. Step 3: Cross multiply
    218,651.51x = 328,003.53 × 206,694.08
  4. Step 4: Simplify right side
    218,651.51x = 67,796,387,870.10
  5. Step 5: Solve for x
    x = 67,796,387,870.10/218,651.51
  6. Step 6: Final answer
    x = 310,065.96

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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.