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Finding the Fourth Proportional to 462.40, 638.08 and 263.24

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Solution

The fourth proportional to 462.40, 638.08 and 263.24 is: 363.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.40 : 638.08 = 263.24 : x
  2. Step 2: Convert to fraction form
    462.40/638.08 = 263.24/x
  3. Step 3: Cross multiply
    462.40x = 638.08 × 263.24
  4. Step 4: Simplify right side
    462.40x = 167,968.18
  5. Step 5: Solve for x
    x = 167,968.18/462.40
  6. Step 6: Final answer
    x = 363.25

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.