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Finding the Fourth Proportional to 401.06, 553.83 and 302.65

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Solution

The fourth proportional to 401.06, 553.83 and 302.65 is: 417.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    401.06 : 553.83 = 302.65 : x
  2. Step 2: Convert to fraction form
    401.06/553.83 = 302.65/x
  3. Step 3: Cross multiply
    401.06x = 553.83 × 302.65
  4. Step 4: Simplify right side
    401.06x = 167,616.65
  5. Step 5: Solve for x
    x = 167,616.65/401.06
  6. Step 6: Final answer
    x = 417.93

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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.