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Finding the Fourth Proportional to 323,715.90, 485,610.30 and 99,074.55

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Solution

The fourth proportional to 323,715.90, 485,610.30 and 99,074.55 is: 148,622.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    323,715.90 : 485,610.30 = 99,074.55 : x
  2. Step 2: Convert to fraction form
    323,715.90/485,610.30 = 99,074.55/x
  3. Step 3: Cross multiply
    323,715.90x = 485,610.30 × 99,074.55
  4. Step 4: Simplify right side
    323,715.90x = 48,111,621,947.87
  5. Step 5: Solve for x
    x = 48,111,621,947.87/323,715.90
  6. Step 6: Final answer
    x = 148,622.98

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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.