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Finding the Fourth Proportional to 434.46, 651.89 and 261.19

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Solution

The fourth proportional to 434.46, 651.89 and 261.19 is: 391.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    434.46 : 651.89 = 261.19 : x
  2. Step 2: Convert to fraction form
    434.46/651.89 = 261.19/x
  3. Step 3: Cross multiply
    434.46x = 651.89 × 261.19
  4. Step 4: Simplify right side
    434.46x = 170,266.17
  5. Step 5: Solve for x
    x = 170,266.17/434.46
  6. Step 6: Final answer
    x = 391.90

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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.