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Finding the Fourth Proportional to 406.66, 610.01 and 201.40

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Solution

The fourth proportional to 406.66, 610.01 and 201.40 is: 302.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    406.66 : 610.01 = 201.40 : x
  2. Step 2: Convert to fraction form
    406.66/610.01 = 201.40/x
  3. Step 3: Cross multiply
    406.66x = 610.01 × 201.40
  4. Step 4: Simplify right side
    406.66x = 122,856.01
  5. Step 5: Solve for x
    x = 122,856.01/406.66
  6. Step 6: Final answer
    x = 302.11

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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.