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Finding the Fourth Proportional to 1,942,581.20, 2,912,489.40 and 744,040.40

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Solution

The fourth proportional to 1,942,581.20, 2,912,489.40 and 744,040.40 is: 1,115,531.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,942,581.20 : 2,912,489.40 = 744,040.40 : x
  2. Step 2: Convert to fraction form
    1,942,581.20/2,912,489.40 = 744,040.40/x
  3. Step 3: Cross multiply
    1,942,581.20x = 2,912,489.40 × 744,040.40
  4. Step 4: Simplify right side
    1,942,581.20x = 2,167,009,778,171.76
  5. Step 5: Solve for x
    x = 2,167,009,778,171.76/1,942,581.20
  6. Step 6: Final answer
    x = 1,115,531.12

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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.