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Finding the Fourth Proportional to 280.14, 386.38 and 193.02

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Solution

The fourth proportional to 280.14, 386.38 and 193.02 is: 266.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.14 : 386.38 = 193.02 : x
  2. Step 2: Convert to fraction form
    280.14/386.38 = 193.02/x
  3. Step 3: Cross multiply
    280.14x = 386.38 × 193.02
  4. Step 4: Simplify right side
    280.14x = 74,579.07
  5. Step 5: Solve for x
    x = 74,579.07/280.14
  6. Step 6: Final answer
    x = 266.22

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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.