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Finding the Fourth Proportional to 279,376.28, 419,078.28 and 79,726.08

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Solution

The fourth proportional to 279,376.28, 419,078.28 and 79,726.08 is: 119,593.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,376.28 : 419,078.28 = 79,726.08 : x
  2. Step 2: Convert to fraction form
    279,376.28/419,078.28 = 79,726.08/x
  3. Step 3: Cross multiply
    279,376.28x = 419,078.28 × 79,726.08
  4. Step 4: Simplify right side
    279,376.28x = 33,411,468,477.54
  5. Step 5: Solve for x
    x = 33,411,468,477.54/279,376.28
  6. Step 6: Final answer
    x = 119,593.08

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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.