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Finding the Fourth Proportional to 243.59, 336.08 and 145.31

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Solution

The fourth proportional to 243.59, 336.08 and 145.31 is: 200.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    243.59 : 336.08 = 145.31 : x
  2. Step 2: Convert to fraction form
    243.59/336.08 = 145.31/x
  3. Step 3: Cross multiply
    243.59x = 336.08 × 145.31
  4. Step 4: Simplify right side
    243.59x = 48,834.47
  5. Step 5: Solve for x
    x = 48,834.47/243.59
  6. Step 6: Final answer
    x = 200.48

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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.