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Finding the Fourth Proportional to 321,820.40, 482,903.40 and 134,850.80

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Solution

The fourth proportional to 321,820.40, 482,903.40 and 134,850.80 is: 202,348.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,820.40 : 482,903.40 = 134,850.80 : x
  2. Step 2: Convert to fraction form
    321,820.40/482,903.40 = 134,850.80/x
  3. Step 3: Cross multiply
    321,820.40x = 482,903.40 × 134,850.80
  4. Step 4: Simplify right side
    321,820.40x = 65,119,909,812.72
  5. Step 5: Solve for x
    x = 65,119,909,812.72/321,820.40
  6. Step 6: Final answer
    x = 202,348.61

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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.