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Finding the Fourth Proportional to 462.58, 638.45 and 266.20

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Solution

The fourth proportional to 462.58, 638.45 and 266.20 is: 367.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    462.58 : 638.45 = 266.20 : x
  2. Step 2: Convert to fraction form
    462.58/638.45 = 266.20/x
  3. Step 3: Cross multiply
    462.58x = 638.45 × 266.20
  4. Step 4: Simplify right side
    462.58x = 169,955.39
  5. Step 5: Solve for x
    x = 169,955.39/462.58
  6. Step 6: Final answer
    x = 367.41

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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.