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Finding the Fourth Proportional to 247,290.78, 341,279.60 and 138,406.01

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Solution

The fourth proportional to 247,290.78, 341,279.60 and 138,406.01 is: 191,010.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    247,290.78 : 341,279.60 = 138,406.01 : x
  2. Step 2: Convert to fraction form
    247,290.78/341,279.60 = 138,406.01/x
  3. Step 3: Cross multiply
    247,290.78x = 341,279.60 × 138,406.01
  4. Step 4: Simplify right side
    247,290.78x = 47,235,145,331.97
  5. Step 5: Solve for x
    x = 47,235,145,331.97/247,290.78
  6. Step 6: Final answer
    x = 191,010.54

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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.