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Finding the Fourth Proportional to 343,139.20, 515,054.40 and 165,788.80

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Solution

The fourth proportional to 343,139.20, 515,054.40 and 165,788.80 is: 248,850.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,139.20 : 515,054.40 = 165,788.80 : x
  2. Step 2: Convert to fraction form
    343,139.20/515,054.40 = 165,788.80/x
  3. Step 3: Cross multiply
    343,139.20x = 515,054.40 × 165,788.80
  4. Step 4: Simplify right side
    343,139.20x = 85,390,250,910.72
  5. Step 5: Solve for x
    x = 85,390,250,910.72/343,139.20
  6. Step 6: Final answer
    x = 248,850.18

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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.