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Finding the Fourth Proportional to 338.84, 504.91 and 319.64

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Solution

The fourth proportional to 338.84, 504.91 and 319.64 is: 476.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    338.84 : 504.91 = 319.64 : x
  2. Step 2: Convert to fraction form
    338.84/504.91 = 319.64/x
  3. Step 3: Cross multiply
    338.84x = 504.91 × 319.64
  4. Step 4: Simplify right side
    338.84x = 161,389.43
  5. Step 5: Solve for x
    x = 161,389.43/338.84
  6. Step 6: Final answer
    x = 476.30

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.