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Finding the Fourth Proportional to 308.80, 424.06 and 259.59

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Solution

The fourth proportional to 308.80, 424.06 and 259.59 is: 356.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    308.80 : 424.06 = 259.59 : x
  2. Step 2: Convert to fraction form
    308.80/424.06 = 259.59/x
  3. Step 3: Cross multiply
    308.80x = 424.06 × 259.59
  4. Step 4: Simplify right side
    308.80x = 110,081.74
  5. Step 5: Solve for x
    x = 110,081.74/308.80
  6. Step 6: Final answer
    x = 356.48

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.