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Finding the Fourth Proportional to 285,316.33, 393,736.29 and 157,991.92

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Solution

The fourth proportional to 285,316.33, 393,736.29 and 157,991.92 is: 218,028.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,316.33 : 393,736.29 = 157,991.92 : x
  2. Step 2: Convert to fraction form
    285,316.33/393,736.29 = 157,991.92/x
  3. Step 3: Cross multiply
    285,316.33x = 393,736.29 × 157,991.92
  4. Step 4: Simplify right side
    285,316.33x = 62,207,152,430.78
  5. Step 5: Solve for x
    x = 62,207,152,430.78/285,316.33
  6. Step 6: Final answer
    x = 218,028.71

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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.