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Finding the Fourth Proportional to 462.55, 692.58 and 381.76

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Solution

The fourth proportional to 462.55, 692.58 and 381.76 is: 571.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.55 : 692.58 = 381.76 : x
  2. Step 2: Convert to fraction form
    462.55/692.58 = 381.76/x
  3. Step 3: Cross multiply
    462.55x = 692.58 × 381.76
  4. Step 4: Simplify right side
    462.55x = 264,399.34
  5. Step 5: Solve for x
    x = 264,399.34/462.55
  6. Step 6: Final answer
    x = 571.61

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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.