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Finding the Fourth Proportional to 383.49, 529.18 and 243.63

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Solution

The fourth proportional to 383.49, 529.18 and 243.63 is: 336.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.49 : 529.18 = 243.63 : x
  2. Step 2: Convert to fraction form
    383.49/529.18 = 243.63/x
  3. Step 3: Cross multiply
    383.49x = 529.18 × 243.63
  4. Step 4: Simplify right side
    383.49x = 128,923.51
  5. Step 5: Solve for x
    x = 128,923.51/383.49
  6. Step 6: Final answer
    x = 336.18

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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.