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Finding the Fourth Proportional to 381.41, 526.53 and 243.49

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Solution

The fourth proportional to 381.41, 526.53 and 243.49 is: 336.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    381.41 : 526.53 = 243.49 : x
  2. Step 2: Convert to fraction form
    381.41/526.53 = 243.49/x
  3. Step 3: Cross multiply
    381.41x = 526.53 × 243.49
  4. Step 4: Simplify right side
    381.41x = 128,203.57
  5. Step 5: Solve for x
    x = 128,203.57/381.41
  6. Step 6: Final answer
    x = 336.13

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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.