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Finding the Fourth Proportional to 378.83, 567.81 and 287.25

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Solution

The fourth proportional to 378.83, 567.81 and 287.25 is: 430.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    378.83 : 567.81 = 287.25 : x
  2. Step 2: Convert to fraction form
    378.83/567.81 = 287.25/x
  3. Step 3: Cross multiply
    378.83x = 567.81 × 287.25
  4. Step 4: Simplify right side
    378.83x = 163,103.42
  5. Step 5: Solve for x
    x = 163,103.42/378.83
  6. Step 6: Final answer
    x = 430.55

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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.