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Finding the Fourth Proportional to 323,516.20, 485,187.90 and 98,876.20

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Solution

The fourth proportional to 323,516.20, 485,187.90 and 98,876.20 is: 148,287.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,516.20 : 485,187.90 = 98,876.20 : x
  2. Step 2: Convert to fraction form
    323,516.20/485,187.90 = 98,876.20/x
  3. Step 3: Cross multiply
    323,516.20x = 485,187.90 × 98,876.20
  4. Step 4: Simplify right side
    323,516.20x = 47,973,535,837.98
  5. Step 5: Solve for x
    x = 47,973,535,837.98/323,516.20
  6. Step 6: Final answer
    x = 148,287.89

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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.