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Finding the Fourth Proportional to 285,315.92, 393,735.88 and 157,991.48

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Solution

The fourth proportional to 285,315.92, 393,735.88 and 157,991.48 is: 218,028.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,315.92 : 393,735.88 = 157,991.48 : x
  2. Step 2: Convert to fraction form
    285,315.92/393,735.88 = 157,991.48/x
  3. Step 3: Cross multiply
    285,315.92x = 393,735.88 × 157,991.48
  4. Step 4: Simplify right side
    285,315.92x = 62,206,914,410.30
  5. Step 5: Solve for x
    x = 62,206,914,410.30/285,315.92
  6. Step 6: Final answer
    x = 218,028.19

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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.