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Finding the Fourth Proportional to 343,654.60, 515,470.56 and 141,243.72

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Solution

The fourth proportional to 343,654.60, 515,470.56 and 141,243.72 is: 211,860.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,654.60 : 515,470.56 = 141,243.72 : x
  2. Step 2: Convert to fraction form
    343,654.60/515,470.56 = 141,243.72/x
  3. Step 3: Cross multiply
    343,654.60x = 515,470.56 × 141,243.72
  4. Step 4: Simplify right side
    343,654.60x = 72,806,979,444.88
  5. Step 5: Solve for x
    x = 72,806,979,444.88/343,654.60
  6. Step 6: Final answer
    x = 211,860.92

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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.