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Finding the Fourth Proportional to 220,078.66, 329,579.59 and 198,779.23

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Solution

The fourth proportional to 220,078.66, 329,579.59 and 198,779.23 is: 297,682.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    220,078.66 : 329,579.59 = 198,779.23 : x
  2. Step 2: Convert to fraction form
    220,078.66/329,579.59 = 198,779.23/x
  3. Step 3: Cross multiply
    220,078.66x = 329,579.59 × 198,779.23
  4. Step 4: Simplify right side
    220,078.66x = 65,513,577,123.92
  5. Step 5: Solve for x
    x = 65,513,577,123.92/220,078.66
  6. Step 6: Final answer
    x = 297,682.55

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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.