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Finding the Fourth Proportional to 313, 471.91 and 249.64

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Solution

The fourth proportional to 313, 471.91 and 249.64 is: 376.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    313 : 471.91 = 249.64 : x
  2. Step 2: Convert to fraction form
    313/471.91 = 249.64/x
  3. Step 3: Cross multiply
    313x = 471.91 × 249.64
  4. Step 4: Simplify right side
    313x = 117,807.61
  5. Step 5: Solve for x
    x = 117,807.61/313
  6. Step 6: Final answer
    x = 376.38

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.