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Finding the Fourth Proportional to 437.20, 603.45 and 271.55

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Solution

The fourth proportional to 437.20, 603.45 and 271.55 is: 374.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.20 : 603.45 = 271.55 : x
  2. Step 2: Convert to fraction form
    437.20/603.45 = 271.55/x
  3. Step 3: Cross multiply
    437.20x = 603.45 × 271.55
  4. Step 4: Simplify right side
    437.20x = 163,868.36
  5. Step 5: Solve for x
    x = 163,868.36/437.20
  6. Step 6: Final answer
    x = 374.82

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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.