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Finding the Fourth Proportional to 3,981,627.20, 5,972,462.40 and 989,811.20

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Solution

The fourth proportional to 3,981,627.20, 5,972,462.40 and 989,811.20 is: 1,484,722.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,627.20 : 5,972,462.40 = 989,811.20 : x
  2. Step 2: Convert to fraction form
    3,981,627.20/5,972,462.40 = 989,811.20/x
  3. Step 3: Cross multiply
    3,981,627.20x = 5,972,462.40 × 989,811.20
  4. Step 4: Simplify right side
    3,981,627.20x = 5,911,610,175,098.88
  5. Step 5: Solve for x
    x = 5,911,610,175,098.88/3,981,627.20
  6. Step 6: Final answer
    x = 1,484,722.17

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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.