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Finding the Fourth Proportional to 462.64, 693.40 and 308.40

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Solution

The fourth proportional to 462.64, 693.40 and 308.40 is: 462.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.64 : 693.40 = 308.40 : x
  2. Step 2: Convert to fraction form
    462.64/693.40 = 308.40/x
  3. Step 3: Cross multiply
    462.64x = 693.40 × 308.40
  4. Step 4: Simplify right side
    462.64x = 213,844.56
  5. Step 5: Solve for x
    x = 213,844.56/462.64
  6. Step 6: Final answer
    x = 462.23

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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.