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Finding the Fourth Proportional to 290.65, 401.13 and 159.67

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Solution

The fourth proportional to 290.65, 401.13 and 159.67 is: 220.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    290.65 : 401.13 = 159.67 : x
  2. Step 2: Convert to fraction form
    290.65/401.13 = 159.67/x
  3. Step 3: Cross multiply
    290.65x = 401.13 × 159.67
  4. Step 4: Simplify right side
    290.65x = 64,048.43
  5. Step 5: Solve for x
    x = 64,048.43/290.65
  6. Step 6: Final answer
    x = 220.36

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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.