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Finding the Fourth Proportional to 418.01, 626.97 and 186.91

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Solution

The fourth proportional to 418.01, 626.97 and 186.91 is: 280.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    418.01 : 626.97 = 186.91 : x
  2. Step 2: Convert to fraction form
    418.01/626.97 = 186.91/x
  3. Step 3: Cross multiply
    418.01x = 626.97 × 186.91
  4. Step 4: Simplify right side
    418.01x = 117,186.10
  5. Step 5: Solve for x
    x = 117,186.10/418.01
  6. Step 6: Final answer
    x = 280.35

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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.