Home / 305,531.80-421,684.56-178,207.38

Finding the Fourth Proportional to 305,531.80, 421,684.56 and 178,207.38

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Solution

The fourth proportional to 305,531.80, 421,684.56 and 178,207.38 is: 245,955.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,531.80 : 421,684.56 = 178,207.38 : x
  2. Step 2: Convert to fraction form
    305,531.80/421,684.56 = 178,207.38/x
  3. Step 3: Cross multiply
    305,531.80x = 421,684.56 × 178,207.38
  4. Step 4: Simplify right side
    305,531.80x = 75,147,300,624.05
  5. Step 5: Solve for x
    x = 75,147,300,624.05/305,531.80
  6. Step 6: Final answer
    x = 245,955.74

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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.