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Finding the Fourth Proportional to 408.60, 612.50 and 264.42

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Solution

The fourth proportional to 408.60, 612.50 and 264.42 is: 396.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    408.60 : 612.50 = 264.42 : x
  2. Step 2: Convert to fraction form
    408.60/612.50 = 264.42/x
  3. Step 3: Cross multiply
    408.60x = 612.50 × 264.42
  4. Step 4: Simplify right side
    408.60x = 161,955.93
  5. Step 5: Solve for x
    x = 161,955.93/408.60
  6. Step 6: Final answer
    x = 396.37

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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.