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Finding the Fourth Proportional to 378.64, 567.91 and 104.76

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Solution

The fourth proportional to 378.64, 567.91 and 104.76 is: 157.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.64 : 567.91 = 104.76 : x
  2. Step 2: Convert to fraction form
    378.64/567.91 = 104.76/x
  3. Step 3: Cross multiply
    378.64x = 567.91 × 104.76
  4. Step 4: Simplify right side
    378.64x = 59,494.38
  5. Step 5: Solve for x
    x = 59,494.38/378.64
  6. Step 6: Final answer
    x = 157.13

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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.