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Finding the Fourth Proportional to 620,761.20, 931,012.20 and 265,786.80

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Solution

The fourth proportional to 620,761.20, 931,012.20 and 265,786.80 is: 398,624.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,761.20 : 931,012.20 = 265,786.80 : x
  2. Step 2: Convert to fraction form
    620,761.20/931,012.20 = 265,786.80/x
  3. Step 3: Cross multiply
    620,761.20x = 931,012.20 × 265,786.80
  4. Step 4: Simplify right side
    620,761.20x = 247,450,753,398.96
  5. Step 5: Solve for x
    x = 247,450,753,398.96/620,761.20
  6. Step 6: Final answer
    x = 398,624.71

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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.