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Finding the Fourth Proportional to 461.74, 692.70 and 380.92

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Solution

The fourth proportional to 461.74, 692.70 and 380.92 is: 571.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    461.74 : 692.70 = 380.92 : x
  2. Step 2: Convert to fraction form
    461.74/692.70 = 380.92/x
  3. Step 3: Cross multiply
    461.74x = 692.70 × 380.92
  4. Step 4: Simplify right side
    461.74x = 263,863.28
  5. Step 5: Solve for x
    x = 263,863.28/461.74
  6. Step 6: Final answer
    x = 571.45

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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.