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Finding the Fourth Proportional to 279,883.84, 386,021.28 and 179,291.20

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Solution

The fourth proportional to 279,883.84, 386,021.28 and 179,291.20 is: 247,281.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,883.84 : 386,021.28 = 179,291.20 : x
  2. Step 2: Convert to fraction form
    279,883.84/386,021.28 = 179,291.20/x
  3. Step 3: Cross multiply
    279,883.84x = 386,021.28 × 179,291.20
  4. Step 4: Simplify right side
    279,883.84x = 69,210,218,516.74
  5. Step 5: Solve for x
    x = 69,210,218,516.74/279,883.84
  6. Step 6: Final answer
    x = 247,281.94

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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.