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Finding the Fourth Proportional to 323,530.20, 485,208.90 and 98,890.20

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Solution

The fourth proportional to 323,530.20, 485,208.90 and 98,890.20 is: 148,308.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,530.20 : 485,208.90 = 98,890.20 : x
  2. Step 2: Convert to fraction form
    323,530.20/485,208.90 = 98,890.20/x
  3. Step 3: Cross multiply
    323,530.20x = 485,208.90 × 98,890.20
  4. Step 4: Simplify right side
    323,530.20x = 47,982,405,162.78
  5. Step 5: Solve for x
    x = 47,982,405,162.78/323,530.20
  6. Step 6: Final answer
    x = 148,308.89

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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.