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Finding the Fourth Proportional to 279,805.78, 386,132.04 and 152,481.40

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Solution

The fourth proportional to 279,805.78, 386,132.04 and 152,481.40 is: 210,424.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,805.78 : 386,132.04 = 152,481.40 : x
  2. Step 2: Convert to fraction form
    279,805.78/386,132.04 = 152,481.40/x
  3. Step 3: Cross multiply
    279,805.78x = 386,132.04 × 152,481.40
  4. Step 4: Simplify right side
    279,805.78x = 58,877,954,044.06
  5. Step 5: Solve for x
    x = 58,877,954,044.06/279,805.78
  6. Step 6: Final answer
    x = 210,424.37

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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.