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Finding the Fourth Proportional to 279,328.15, 418,996.11 and 79,648.61

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Solution

The fourth proportional to 279,328.15, 418,996.11 and 79,648.61 is: 119,474.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,328.15 : 418,996.11 = 79,648.61 : x
  2. Step 2: Convert to fraction form
    279,328.15/418,996.11 = 79,648.61/x
  3. Step 3: Cross multiply
    279,328.15x = 418,996.11 × 79,648.61
  4. Step 4: Simplify right side
    279,328.15x = 33,372,457,756.91
  5. Step 5: Solve for x
    x = 33,372,457,756.91/279,328.15
  6. Step 6: Final answer
    x = 119,474.02

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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.