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Finding the Fourth Proportional to 638,704.80, 958,834.80 and 322,999.20

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Solution

The fourth proportional to 638,704.80, 958,834.80 and 322,999.20 is: 484,892.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,704.80 : 958,834.80 = 322,999.20 : x
  2. Step 2: Convert to fraction form
    638,704.80/958,834.80 = 322,999.20/x
  3. Step 3: Cross multiply
    638,704.80x = 958,834.80 × 322,999.20
  4. Step 4: Simplify right side
    638,704.80x = 309,702,873,332.16
  5. Step 5: Solve for x
    x = 309,702,873,332.16/638,704.80
  6. Step 6: Final answer
    x = 484,892.04

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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.