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Finding the Fourth Proportional to 986,419.80, 1,480,212.90 and 719,508.60

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Solution

The fourth proportional to 986,419.80, 1,480,212.90 and 719,508.60 is: 1,079,688.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    986,419.80 : 1,480,212.90 = 719,508.60 : x
  2. Step 2: Convert to fraction form
    986,419.80/1,480,212.90 = 719,508.60/x
  3. Step 3: Cross multiply
    986,419.80x = 1,480,212.90 × 719,508.60
  4. Step 4: Simplify right side
    986,419.80x = 1,065,025,911,380.94
  5. Step 5: Solve for x
    x = 1,065,025,911,380.94/986,419.80
  6. Step 6: Final answer
    x = 1,079,688.29

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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.