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Finding the Fourth Proportional to 515,856.20, 773,784.30 and 141,879.20

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Solution

The fourth proportional to 515,856.20, 773,784.30 and 141,879.20 is: 212,818.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,856.20 : 773,784.30 = 141,879.20 : x
  2. Step 2: Convert to fraction form
    515,856.20/773,784.30 = 141,879.20/x
  3. Step 3: Cross multiply
    515,856.20x = 773,784.30 × 141,879.20
  4. Step 4: Simplify right side
    515,856.20x = 109,783,897,456.56
  5. Step 5: Solve for x
    x = 109,783,897,456.56/515,856.20
  6. Step 6: Final answer
    x = 212,818.80

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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.