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Finding the Fourth Proportional to 816.02, 1,224.72 and 426.47

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Solution

The fourth proportional to 816.02, 1,224.72 and 426.47 is: 640.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    816.02 : 1,224.72 = 426.47 : x
  2. Step 2: Convert to fraction form
    816.02/1,224.72 = 426.47/x
  3. Step 3: Cross multiply
    816.02x = 1,224.72 × 426.47
  4. Step 4: Simplify right side
    816.02x = 522,300.21
  5. Step 5: Solve for x
    x = 522,300.21/816.02
  6. Step 6: Final answer
    x = 640.05

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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.