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Finding the Fourth Proportional to 333,996.86, 500,988 and 81,278.48

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Solution

The fourth proportional to 333,996.86, 500,988 and 81,278.48 is: 121,915.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    333,996.86 : 500,988 = 81,278.48 : x
  2. Step 2: Convert to fraction form
    333,996.86/500,988 = 81,278.48/x
  3. Step 3: Cross multiply
    333,996.86x = 500,988 × 81,278.48
  4. Step 4: Simplify right side
    333,996.86x = 40,719,543,138.24
  5. Step 5: Solve for x
    x = 40,719,543,138.24/333,996.86
  6. Step 6: Final answer
    x = 121,915.95

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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.