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Finding the Fourth Proportional to 825.57, 1,237.77 and 414.42

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Solution

The fourth proportional to 825.57, 1,237.77 and 414.42 is: 621.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    825.57 : 1,237.77 = 414.42 : x
  2. Step 2: Convert to fraction form
    825.57/1,237.77 = 414.42/x
  3. Step 3: Cross multiply
    825.57x = 1,237.77 × 414.42
  4. Step 4: Simplify right side
    825.57x = 512,956.64
  5. Step 5: Solve for x
    x = 512,956.64/825.57
  6. Step 6: Final answer
    x = 621.34

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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.