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Finding the Fourth Proportional to 368.76, 509.05 and 249.15

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Solution

The fourth proportional to 368.76, 509.05 and 249.15 is: 343.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    368.76 : 509.05 = 249.15 : x
  2. Step 2: Convert to fraction form
    368.76/509.05 = 249.15/x
  3. Step 3: Cross multiply
    368.76x = 509.05 × 249.15
  4. Step 4: Simplify right side
    368.76x = 126,829.81
  5. Step 5: Solve for x
    x = 126,829.81/368.76
  6. Step 6: Final answer
    x = 343.94

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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.