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Finding the Fourth Proportional to 314.07, 433.38 and 290.85

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Solution

The fourth proportional to 314.07, 433.38 and 290.85 is: 401.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    314.07 : 433.38 = 290.85 : x
  2. Step 2: Convert to fraction form
    314.07/433.38 = 290.85/x
  3. Step 3: Cross multiply
    314.07x = 433.38 × 290.85
  4. Step 4: Simplify right side
    314.07x = 126,048.57
  5. Step 5: Solve for x
    x = 126,048.57/314.07
  6. Step 6: Final answer
    x = 401.34

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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.