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Finding the Fourth Proportional to 383.40, 529.38 and 267.12

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Solution

The fourth proportional to 383.40, 529.38 and 267.12 is: 368.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    383.40 : 529.38 = 267.12 : x
  2. Step 2: Convert to fraction form
    383.40/529.38 = 267.12/x
  3. Step 3: Cross multiply
    383.40x = 529.38 × 267.12
  4. Step 4: Simplify right side
    383.40x = 141,407.99
  5. Step 5: Solve for x
    x = 141,407.99/383.40
  6. Step 6: Final answer
    x = 368.83

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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.