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Finding the Fourth Proportional to 1,220.16, 1,829.92 and 354.24

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Solution

The fourth proportional to 1,220.16, 1,829.92 and 354.24 is: 531.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,220.16 : 1,829.92 = 354.24 : x
  2. Step 2: Convert to fraction form
    1,220.16/1,829.92 = 354.24/x
  3. Step 3: Cross multiply
    1,220.16x = 1,829.92 × 354.24
  4. Step 4: Simplify right side
    1,220.16x = 648,230.86
  5. Step 5: Solve for x
    x = 648,230.86/1,220.16
  6. Step 6: Final answer
    x = 531.27

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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.