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Finding the Fourth Proportional to 285.51, 428.54 and 267.83

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Solution

The fourth proportional to 285.51, 428.54 and 267.83 is: 401.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    285.51 : 428.54 = 267.83 : x
  2. Step 2: Convert to fraction form
    285.51/428.54 = 267.83/x
  3. Step 3: Cross multiply
    285.51x = 428.54 × 267.83
  4. Step 4: Simplify right side
    285.51x = 114,772.39
  5. Step 5: Solve for x
    x = 114,772.39/285.51
  6. Step 6: Final answer
    x = 401.99

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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.