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Finding the Fourth Proportional to 266.78, 368.15 and 148.75

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Solution

The fourth proportional to 266.78, 368.15 and 148.75 is: 205.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    266.78 : 368.15 = 148.75 : x
  2. Step 2: Convert to fraction form
    266.78/368.15 = 148.75/x
  3. Step 3: Cross multiply
    266.78x = 368.15 × 148.75
  4. Step 4: Simplify right side
    266.78x = 54,762.31
  5. Step 5: Solve for x
    x = 54,762.31/266.78
  6. Step 6: Final answer
    x = 205.27

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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.