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Finding the Fourth Proportional to 398,780.28, 550,301.58 and 219,932.28

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Solution

The fourth proportional to 398,780.28, 550,301.58 and 219,932.28 is: 303,498.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,780.28 : 550,301.58 = 219,932.28 : x
  2. Step 2: Convert to fraction form
    398,780.28/550,301.58 = 219,932.28/x
  3. Step 3: Cross multiply
    398,780.28x = 550,301.58 × 219,932.28
  4. Step 4: Simplify right side
    398,780.28x = 121,029,081,177.00
  5. Step 5: Solve for x
    x = 121,029,081,177.00/398,780.28
  6. Step 6: Final answer
    x = 303,498.16

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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.