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Finding the Fourth Proportional to 239,620.81, 330,617.28 and 157,940.01

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Solution

The fourth proportional to 239,620.81, 330,617.28 and 157,940.01 is: 217,918.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    239,620.81 : 330,617.28 = 157,940.01 : x
  2. Step 2: Convert to fraction form
    239,620.81/330,617.28 = 157,940.01/x
  3. Step 3: Cross multiply
    239,620.81x = 330,617.28 × 157,940.01
  4. Step 4: Simplify right side
    239,620.81x = 52,217,696,509.37
  5. Step 5: Solve for x
    x = 52,217,696,509.37/239,620.81
  6. Step 6: Final answer
    x = 217,918.04

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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.