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Finding the Fourth Proportional to 407.80, 562.80 and 268.03

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Solution

The fourth proportional to 407.80, 562.80 and 268.03 is: 369.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407.80 : 562.80 = 268.03 : x
  2. Step 2: Convert to fraction form
    407.80/562.80 = 268.03/x
  3. Step 3: Cross multiply
    407.80x = 562.80 × 268.03
  4. Step 4: Simplify right side
    407.80x = 150,843.13
  5. Step 5: Solve for x
    x = 150,843.13/407.80
  6. Step 6: Final answer
    x = 369.90

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.