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Finding the Fourth Proportional to 548,216.40, 821,806.20 and 323,749.20

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Solution

The fourth proportional to 548,216.40, 821,806.20 and 323,749.20 is: 485,317.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    548,216.40 : 821,806.20 = 323,749.20 : x
  2. Step 2: Convert to fraction form
    548,216.40/821,806.20 = 323,749.20/x
  3. Step 3: Cross multiply
    548,216.40x = 821,806.20 × 323,749.20
  4. Step 4: Simplify right side
    548,216.40x = 266,059,099,805.04
  5. Step 5: Solve for x
    x = 266,059,099,805.04/548,216.40
  6. Step 6: Final answer
    x = 485,317.66

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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.