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Finding the Fourth Proportional to 308.60, 424.89 and 259.37

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Solution

The fourth proportional to 308.60, 424.89 and 259.37 is: 357.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.60 : 424.89 = 259.37 : x
  2. Step 2: Convert to fraction form
    308.60/424.89 = 259.37/x
  3. Step 3: Cross multiply
    308.60x = 424.89 × 259.37
  4. Step 4: Simplify right side
    308.60x = 110,203.72
  5. Step 5: Solve for x
    x = 110,203.72/308.60
  6. Step 6: Final answer
    x = 357.11

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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.