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Finding the Fourth Proportional to 319.44, 476.16 and 316.32

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Solution

The fourth proportional to 319.44, 476.16 and 316.32 is: 471.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    319.44 : 476.16 = 316.32 : x
  2. Step 2: Convert to fraction form
    319.44/476.16 = 316.32/x
  3. Step 3: Cross multiply
    319.44x = 476.16 × 316.32
  4. Step 4: Simplify right side
    319.44x = 150,618.93
  5. Step 5: Solve for x
    x = 150,618.93/319.44
  6. Step 6: Final answer
    x = 471.51

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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.