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Finding the Fourth Proportional to 402.67, 603.57 and 265.81

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Solution

The fourth proportional to 402.67, 603.57 and 265.81 is: 398.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.67 : 603.57 = 265.81 : x
  2. Step 2: Convert to fraction form
    402.67/603.57 = 265.81/x
  3. Step 3: Cross multiply
    402.67x = 603.57 × 265.81
  4. Step 4: Simplify right side
    402.67x = 160,434.94
  5. Step 5: Solve for x
    x = 160,434.94/402.67
  6. Step 6: Final answer
    x = 398.43

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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.