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Finding the Fourth Proportional to 280.06, 386.60 and 169.51

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Solution

The fourth proportional to 280.06, 386.60 and 169.51 is: 233.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    280.06 : 386.60 = 169.51 : x
  2. Step 2: Convert to fraction form
    280.06/386.60 = 169.51/x
  3. Step 3: Cross multiply
    280.06x = 386.60 × 169.51
  4. Step 4: Simplify right side
    280.06x = 65,532.57
  5. Step 5: Solve for x
    x = 65,532.57/280.06
  6. Step 6: Final answer
    x = 233.99

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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.