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Finding the Fourth Proportional to 462.16, 692.46 and 445.30

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Solution

The fourth proportional to 462.16, 692.46 and 445.30 is: 667.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.16 : 692.46 = 445.30 : x
  2. Step 2: Convert to fraction form
    462.16/692.46 = 445.30/x
  3. Step 3: Cross multiply
    462.16x = 692.46 × 445.30
  4. Step 4: Simplify right side
    462.16x = 308,352.44
  5. Step 5: Solve for x
    x = 308,352.44/462.16
  6. Step 6: Final answer
    x = 667.20

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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.