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Finding the Fourth Proportional to 3,008.48, 4,512 and 817.20

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Solution

The fourth proportional to 3,008.48, 4,512 and 817.20 is: 1,225.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,008.48 : 4,512 = 817.20 : x
  2. Step 2: Convert to fraction form
    3,008.48/4,512 = 817.20/x
  3. Step 3: Cross multiply
    3,008.48x = 4,512 × 817.20
  4. Step 4: Simplify right side
    3,008.48x = 3,687,206.40
  5. Step 5: Solve for x
    x = 3,687,206.40/3,008.48
  6. Step 6: Final answer
    x = 1,225.60

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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.