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Finding the Fourth Proportional to 442.19, 662.16 and 266.38

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Solution

The fourth proportional to 442.19, 662.16 and 266.38 is: 398.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    442.19 : 662.16 = 266.38 : x
  2. Step 2: Convert to fraction form
    442.19/662.16 = 266.38/x
  3. Step 3: Cross multiply
    442.19x = 662.16 × 266.38
  4. Step 4: Simplify right side
    442.19x = 176,386.18
  5. Step 5: Solve for x
    x = 176,386.18/442.19
  6. Step 6: Final answer
    x = 398.89

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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.