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Finding the Fourth Proportional to 380.94, 568.98 and 319.56

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Solution

The fourth proportional to 380.94, 568.98 and 319.56 is: 477.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    380.94 : 568.98 = 319.56 : x
  2. Step 2: Convert to fraction form
    380.94/568.98 = 319.56/x
  3. Step 3: Cross multiply
    380.94x = 568.98 × 319.56
  4. Step 4: Simplify right side
    380.94x = 181,823.25
  5. Step 5: Solve for x
    x = 181,823.25/380.94
  6. Step 6: Final answer
    x = 477.30

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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.