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Finding the Fourth Proportional to 218,653.01, 328,005.78 and 206,695.58

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Solution

The fourth proportional to 218,653.01, 328,005.78 and 206,695.58 is: 310,068.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    218,653.01 : 328,005.78 = 206,695.58 : x
  2. Step 2: Convert to fraction form
    218,653.01/328,005.78 = 206,695.58/x
  3. Step 3: Cross multiply
    218,653.01x = 328,005.78 × 206,695.58
  4. Step 4: Simplify right side
    218,653.01x = 67,797,344,940.45
  5. Step 5: Solve for x
    x = 67,797,344,940.45/218,653.01
  6. Step 6: Final answer
    x = 310,068.20

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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.