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Finding the Fourth Proportional to 1,001,111.60, 1,499,891.88 and 831,638

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Solution

The fourth proportional to 1,001,111.60, 1,499,891.88 and 831,638 is: 1,245,982.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,001,111.60 : 1,499,891.88 = 831,638 : x
  2. Step 2: Convert to fraction form
    1,001,111.60/1,499,891.88 = 831,638/x
  3. Step 3: Cross multiply
    1,001,111.60x = 1,499,891.88 × 831,638
  4. Step 4: Simplify right side
    1,001,111.60x = 1,247,367,083,299.44
  5. Step 5: Solve for x
    x = 1,247,367,083,299.44/1,001,111.60
  6. Step 6: Final answer
    x = 1,245,982.05

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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.