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Finding the Fourth Proportional to 412.36, 567.66 and 381.40

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Solution

The fourth proportional to 412.36, 567.66 and 381.40 is: 525.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    412.36 : 567.66 = 381.40 : x
  2. Step 2: Convert to fraction form
    412.36/567.66 = 381.40/x
  3. Step 3: Cross multiply
    412.36x = 567.66 × 381.40
  4. Step 4: Simplify right side
    412.36x = 216,505.52
  5. Step 5: Solve for x
    x = 216,505.52/412.36
  6. Step 6: Final answer
    x = 525.04

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.