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Finding the Fourth Proportional to 383.74, 529.48 and 243.88

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Solution

The fourth proportional to 383.74, 529.48 and 243.88 is: 336.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.74 : 529.48 = 243.88 : x
  2. Step 2: Convert to fraction form
    383.74/529.48 = 243.88/x
  3. Step 3: Cross multiply
    383.74x = 529.48 × 243.88
  4. Step 4: Simplify right side
    383.74x = 129,128.87
  5. Step 5: Solve for x
    x = 129,128.87/383.74
  6. Step 6: Final answer
    x = 336.50

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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.