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Finding the Fourth Proportional to 3,981,854.40, 5,972,781.60 and 990,038.40

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Solution

The fourth proportional to 3,981,854.40, 5,972,781.60 and 990,038.40 is: 1,485,057.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,854.40 : 5,972,781.60 = 990,038.40 : x
  2. Step 2: Convert to fraction form
    3,981,854.40/5,972,781.60 = 990,038.40/x
  3. Step 3: Cross multiply
    3,981,854.40x = 5,972,781.60 × 990,038.40
  4. Step 4: Simplify right side
    3,981,854.40x = 5,913,283,138,813.44
  5. Step 5: Solve for x
    x = 5,913,283,138,813.44/3,981,854.40
  6. Step 6: Final answer
    x = 1,485,057.60

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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.