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Finding the Fourth Proportional to 321,636.60, 482,685.30 and 134,782.20

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Solution

The fourth proportional to 321,636.60, 482,685.30 and 134,782.20 is: 202,269.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,636.60 : 482,685.30 = 134,782.20 : x
  2. Step 2: Convert to fraction form
    321,636.60/482,685.30 = 134,782.20/x
  3. Step 3: Cross multiply
    321,636.60x = 482,685.30 × 134,782.20
  4. Step 4: Simplify right side
    321,636.60x = 65,057,386,641.66
  5. Step 5: Solve for x
    x = 65,057,386,641.66/321,636.60
  6. Step 6: Final answer
    x = 202,269.85

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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.