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Finding the Fourth Proportional to 274.47, 378.83 and 158.07

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Solution

The fourth proportional to 274.47, 378.83 and 158.07 is: 218.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    274.47 : 378.83 = 158.07 : x
  2. Step 2: Convert to fraction form
    274.47/378.83 = 158.07/x
  3. Step 3: Cross multiply
    274.47x = 378.83 × 158.07
  4. Step 4: Simplify right side
    274.47x = 59,880.87
  5. Step 5: Solve for x
    x = 59,880.87/274.47
  6. Step 6: Final answer
    x = 218.17

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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.