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Finding the Fourth Proportional to 323,638.70, 485,371.65 and 98,998.70

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Solution

The fourth proportional to 323,638.70, 485,371.65 and 98,998.70 is: 148,471.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,638.70 : 485,371.65 = 98,998.70 : x
  2. Step 2: Convert to fraction form
    323,638.70/485,371.65 = 98,998.70/x
  3. Step 3: Cross multiply
    323,638.70x = 485,371.65 × 98,998.70
  4. Step 4: Simplify right side
    323,638.70x = 48,051,162,366.86
  5. Step 5: Solve for x
    x = 48,051,162,366.86/323,638.70
  6. Step 6: Final answer
    x = 148,471.62

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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.