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Finding the Fourth Proportional to 246,990.35, 340,721.28 and 156,193.40

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Solution

The fourth proportional to 246,990.35, 340,721.28 and 156,193.40 is: 215,467.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    246,990.35 : 340,721.28 = 156,193.40 : x
  2. Step 2: Convert to fraction form
    246,990.35/340,721.28 = 156,193.40/x
  3. Step 3: Cross multiply
    246,990.35x = 340,721.28 × 156,193.40
  4. Step 4: Simplify right side
    246,990.35x = 53,218,413,471.95
  5. Step 5: Solve for x
    x = 53,218,413,471.95/246,990.35
  6. Step 6: Final answer
    x = 215,467.59

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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.