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Finding the Fourth Proportional to 401.64, 601.74 and 279.66

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Solution

The fourth proportional to 401.64, 601.74 and 279.66 is: 418.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.64 : 601.74 = 279.66 : x
  2. Step 2: Convert to fraction form
    401.64/601.74 = 279.66/x
  3. Step 3: Cross multiply
    401.64x = 601.74 × 279.66
  4. Step 4: Simplify right side
    401.64x = 168,282.61
  5. Step 5: Solve for x
    x = 168,282.61/401.64
  6. Step 6: Final answer
    x = 418.99

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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.