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Finding the Fourth Proportional to 462.04, 691.68 and 445.64

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Solution

The fourth proportional to 462.04, 691.68 and 445.64 is: 667.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.04 : 691.68 = 445.64 : x
  2. Step 2: Convert to fraction form
    462.04/691.68 = 445.64/x
  3. Step 3: Cross multiply
    462.04x = 691.68 × 445.64
  4. Step 4: Simplify right side
    462.04x = 308,240.28
  5. Step 5: Solve for x
    x = 308,240.28/462.04
  6. Step 6: Final answer
    x = 667.13

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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.