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Finding the Fourth Proportional to 417.65, 626.61 and 186.51

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Solution

The fourth proportional to 417.65, 626.61 and 186.51 is: 279.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    417.65 : 626.61 = 186.51 : x
  2. Step 2: Convert to fraction form
    417.65/626.61 = 186.51/x
  3. Step 3: Cross multiply
    417.65x = 626.61 × 186.51
  4. Step 4: Simplify right side
    417.65x = 116,869.03
  5. Step 5: Solve for x
    x = 116,869.03/417.65
  6. Step 6: Final answer
    x = 279.83

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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.