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Finding the Fourth Proportional to 308,979.80, 426,432.36 and 173,065.68

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Solution

The fourth proportional to 308,979.80, 426,432.36 and 173,065.68 is: 238,853.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,979.80 : 426,432.36 = 173,065.68 : x
  2. Step 2: Convert to fraction form
    308,979.80/426,432.36 = 173,065.68/x
  3. Step 3: Cross multiply
    308,979.80x = 426,432.36 × 173,065.68
  4. Step 4: Simplify right side
    308,979.80x = 73,800,806,357.40
  5. Step 5: Solve for x
    x = 73,800,806,357.40/308,979.80
  6. Step 6: Final answer
    x = 238,853.18

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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.