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Finding the Fourth Proportional to 267.90, 399.91 and 235.50

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Solution

The fourth proportional to 267.90, 399.91 and 235.50 is: 351.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    267.90 : 399.91 = 235.50 : x
  2. Step 2: Convert to fraction form
    267.90/399.91 = 235.50/x
  3. Step 3: Cross multiply
    267.90x = 399.91 × 235.50
  4. Step 4: Simplify right side
    267.90x = 94,178.81
  5. Step 5: Solve for x
    x = 94,178.81/267.90
  6. Step 6: Final answer
    x = 351.54

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.