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Finding the Fourth Proportional to 409.08, 612.65 and 262.37

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Solution

The fourth proportional to 409.08, 612.65 and 262.37 is: 392.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    409.08 : 612.65 = 262.37 : x
  2. Step 2: Convert to fraction form
    409.08/612.65 = 262.37/x
  3. Step 3: Cross multiply
    409.08x = 612.65 × 262.37
  4. Step 4: Simplify right side
    409.08x = 160,736.61
  5. Step 5: Solve for x
    x = 160,736.61/409.08
  6. Step 6: Final answer
    x = 392.92

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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.