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Finding the Fourth Proportional to 243.35, 335.99 and 187.47

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Solution

The fourth proportional to 243.35, 335.99 and 187.47 is: 258.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.35 : 335.99 = 187.47 : x
  2. Step 2: Convert to fraction form
    243.35/335.99 = 187.47/x
  3. Step 3: Cross multiply
    243.35x = 335.99 × 187.47
  4. Step 4: Simplify right side
    243.35x = 62,988.51
  5. Step 5: Solve for x
    x = 62,988.51/243.35
  6. Step 6: Final answer
    x = 258.84

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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.