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Finding the Fourth Proportional to 401.57, 602.17 and 279.89

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Solution

The fourth proportional to 401.57, 602.17 and 279.89 is: 419.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.57 : 602.17 = 279.89 : x
  2. Step 2: Convert to fraction form
    401.57/602.17 = 279.89/x
  3. Step 3: Cross multiply
    401.57x = 602.17 × 279.89
  4. Step 4: Simplify right side
    401.57x = 168,537.65
  5. Step 5: Solve for x
    x = 168,537.65/401.57
  6. Step 6: Final answer
    x = 419.70

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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.