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Finding the Fourth Proportional to 424.77, 636.47 and 262.11

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Solution

The fourth proportional to 424.77, 636.47 and 262.11 is: 392.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    424.77 : 636.47 = 262.11 : x
  2. Step 2: Convert to fraction form
    424.77/636.47 = 262.11/x
  3. Step 3: Cross multiply
    424.77x = 636.47 × 262.11
  4. Step 4: Simplify right side
    424.77x = 166,825.15
  5. Step 5: Solve for x
    x = 166,825.15/424.77
  6. Step 6: Final answer
    x = 392.74

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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.