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Finding the Fourth Proportional to 816.94, 1,225.61 and 406.27

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Solution

The fourth proportional to 816.94, 1,225.61 and 406.27 is: 609.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.94 : 1,225.61 = 406.27 : x
  2. Step 2: Convert to fraction form
    816.94/1,225.61 = 406.27/x
  3. Step 3: Cross multiply
    816.94x = 1,225.61 × 406.27
  4. Step 4: Simplify right side
    816.94x = 497,928.57
  5. Step 5: Solve for x
    x = 497,928.57/816.94
  6. Step 6: Final answer
    x = 609.50

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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.