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Finding the Fourth Proportional to 279,565.05, 419,052.29 and 137,212.28

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Solution

The fourth proportional to 279,565.05, 419,052.29 and 137,212.28 is: 205,673.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,565.05 : 419,052.29 = 137,212.28 : x
  2. Step 2: Convert to fraction form
    279,565.05/419,052.29 = 137,212.28/x
  3. Step 3: Cross multiply
    279,565.05x = 419,052.29 × 137,212.28
  4. Step 4: Simplify right side
    279,565.05x = 57,499,117,368.80
  5. Step 5: Solve for x
    x = 57,499,117,368.80/279,565.05
  6. Step 6: Final answer
    x = 205,673.48

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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.