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Finding the Fourth Proportional to 378.62, 568.05 and 207.50

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Solution

The fourth proportional to 378.62, 568.05 and 207.50 is: 311.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.62 : 568.05 = 207.50 : x
  2. Step 2: Convert to fraction form
    378.62/568.05 = 207.50/x
  3. Step 3: Cross multiply
    378.62x = 568.05 × 207.50
  4. Step 4: Simplify right side
    378.62x = 117,870.38
  5. Step 5: Solve for x
    x = 117,870.38/378.62
  6. Step 6: Final answer
    x = 311.32

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.