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Finding the Fourth Proportional to 434.90, 651.74 and 229.38

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Solution

The fourth proportional to 434.90, 651.74 and 229.38 is: 343.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.90 : 651.74 = 229.38 : x
  2. Step 2: Convert to fraction form
    434.90/651.74 = 229.38/x
  3. Step 3: Cross multiply
    434.90x = 651.74 × 229.38
  4. Step 4: Simplify right side
    434.90x = 149,494.97
  5. Step 5: Solve for x
    x = 149,494.97/434.90
  6. Step 6: Final answer
    x = 343.75

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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.