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Finding the Fourth Proportional to 3,008.20, 4,512.54 and 816.88

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Solution

The fourth proportional to 3,008.20, 4,512.54 and 816.88 is: 1,225.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,008.20 : 4,512.54 = 816.88 : x
  2. Step 2: Convert to fraction form
    3,008.20/4,512.54 = 816.88/x
  3. Step 3: Cross multiply
    3,008.20x = 4,512.54 × 816.88
  4. Step 4: Simplify right side
    3,008.20x = 3,686,203.68
  5. Step 5: Solve for x
    x = 3,686,203.68/3,008.20
  6. Step 6: Final answer
    x = 1,225.39

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1.5x scale

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.