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Finding the Fourth Proportional to 259.28, 387.04 and 236.60

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Solution

The fourth proportional to 259.28, 387.04 and 236.60 is: 353.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    259.28 : 387.04 = 236.60 : x
  2. Step 2: Convert to fraction form
    259.28/387.04 = 236.60/x
  3. Step 3: Cross multiply
    259.28x = 387.04 × 236.60
  4. Step 4: Simplify right side
    259.28x = 91,573.66
  5. Step 5: Solve for x
    x = 91,573.66/259.28
  6. Step 6: Final answer
    x = 353.18

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.