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Finding the Fourth Proportional to 515,991.93, 773,689.92 and 200,079.78

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Solution

The fourth proportional to 515,991.93, 773,689.92 and 200,079.78 is: 300,004.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,991.93 : 773,689.92 = 200,079.78 : x
  2. Step 2: Convert to fraction form
    515,991.93/773,689.92 = 200,079.78/x
  3. Step 3: Cross multiply
    515,991.93x = 773,689.92 × 200,079.78
  4. Step 4: Simplify right side
    515,991.93x = 154,799,708,981.82
  5. Step 5: Solve for x
    x = 154,799,708,981.82/515,991.93
  6. Step 6: Final answer
    x = 300,004.13

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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.