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Finding the Fourth Proportional to 401.53, 601.99 and 206.61

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Solution

The fourth proportional to 401.53, 601.99 and 206.61 is: 309.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.53 : 601.99 = 206.61 : x
  2. Step 2: Convert to fraction form
    401.53/601.99 = 206.61/x
  3. Step 3: Cross multiply
    401.53x = 601.99 × 206.61
  4. Step 4: Simplify right side
    401.53x = 124,376.64
  5. Step 5: Solve for x
    x = 124,376.64/401.53
  6. Step 6: Final answer
    x = 309.76

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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.