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Finding the Fourth Proportional to 321,395.88, 482,188.08 and 143,863.36

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Solution

The fourth proportional to 321,395.88, 482,188.08 and 143,863.36 is: 215,837.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,395.88 : 482,188.08 = 143,863.36 : x
  2. Step 2: Convert to fraction form
    321,395.88/482,188.08 = 143,863.36/x
  3. Step 3: Cross multiply
    321,395.88x = 482,188.08 × 143,863.36
  4. Step 4: Simplify right side
    321,395.88x = 69,369,197,340.75
  5. Step 5: Solve for x
    x = 69,369,197,340.75/321,395.88
  6. Step 6: Final answer
    x = 215,837.23

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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.