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Finding the Fourth Proportional to 437.90, 604.40 and 280.67

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Solution

The fourth proportional to 437.90, 604.40 and 280.67 is: 387.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    437.90 : 604.40 = 280.67 : x
  2. Step 2: Convert to fraction form
    437.90/604.40 = 280.67/x
  3. Step 3: Cross multiply
    437.90x = 604.40 × 280.67
  4. Step 4: Simplify right side
    437.90x = 169,632.52
  5. Step 5: Solve for x
    x = 169,632.52/437.90
  6. Step 6: Final answer
    x = 387.38

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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.