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Finding the Fourth Proportional to 405.45, 607.97 and 200.12

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Solution

The fourth proportional to 405.45, 607.97 and 200.12 is: 300.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    405.45 : 607.97 = 200.12 : x
  2. Step 2: Convert to fraction form
    405.45/607.97 = 200.12/x
  3. Step 3: Cross multiply
    405.45x = 607.97 × 200.12
  4. Step 4: Simplify right side
    405.45x = 121,664.42
  5. Step 5: Solve for x
    x = 121,664.42/405.45
  6. Step 6: Final answer
    x = 300.07

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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.