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Finding the Fourth Proportional to 270.78, 406.15 and 124.50

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Solution

The fourth proportional to 270.78, 406.15 and 124.50 is: 186.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    270.78 : 406.15 = 124.50 : x
  2. Step 2: Convert to fraction form
    270.78/406.15 = 124.50/x
  3. Step 3: Cross multiply
    270.78x = 406.15 × 124.50
  4. Step 4: Simplify right side
    270.78x = 50,565.36
  5. Step 5: Solve for x
    x = 50,565.36/270.78
  6. Step 6: Final answer
    x = 186.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.