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Finding the Fourth Proportional to 402.61, 603.90 and 270.53

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Solution

The fourth proportional to 402.61, 603.90 and 270.53 is: 405.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    402.61 : 603.90 = 270.53 : x
  2. Step 2: Convert to fraction form
    402.61/603.90 = 270.53/x
  3. Step 3: Cross multiply
    402.61x = 603.90 × 270.53
  4. Step 4: Simplify right side
    402.61x = 163,375.59
  5. Step 5: Solve for x
    x = 163,375.59/402.61
  6. Step 6: Final answer
    x = 405.79

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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.