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Finding the Fourth Proportional to 407.08, 609.63 and 200.98

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Solution

The fourth proportional to 407.08, 609.63 and 200.98 is: 300.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.08 : 609.63 = 200.98 : x
  2. Step 2: Convert to fraction form
    407.08/609.63 = 200.98/x
  3. Step 3: Cross multiply
    407.08x = 609.63 × 200.98
  4. Step 4: Simplify right side
    407.08x = 122,523.45
  5. Step 5: Solve for x
    x = 122,523.45/407.08
  6. Step 6: Final answer
    x = 300.98

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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.