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Finding the Fourth Proportional to 401.49, 603.63 and 280.26

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Solution

The fourth proportional to 401.49, 603.63 and 280.26 is: 421.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.49 : 603.63 = 280.26 : x
  2. Step 2: Convert to fraction form
    401.49/603.63 = 280.26/x
  3. Step 3: Cross multiply
    401.49x = 603.63 × 280.26
  4. Step 4: Simplify right side
    401.49x = 169,173.34
  5. Step 5: Solve for x
    x = 169,173.34/401.49
  6. Step 6: Final answer
    x = 421.36

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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.