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Finding the Fourth Proportional to 309,369.14, 426,947.61 and 173,447.66

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Solution

The fourth proportional to 309,369.14, 426,947.61 and 173,447.66 is: 239,367.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,369.14 : 426,947.61 = 173,447.66 : x
  2. Step 2: Convert to fraction form
    309,369.14/426,947.61 = 173,447.66/x
  3. Step 3: Cross multiply
    309,369.14x = 426,947.61 × 173,447.66
  4. Step 4: Simplify right side
    309,369.14x = 74,053,063,897.09
  5. Step 5: Solve for x
    x = 74,053,063,897.09/309,369.14
  6. Step 6: Final answer
    x = 239,367.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.