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Finding the Fourth Proportional to 3,981,664.20, 5,972,496.30 and 989,848.20

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Solution

The fourth proportional to 3,981,664.20, 5,972,496.30 and 989,848.20 is: 1,484,772.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,981,664.20 : 5,972,496.30 = 989,848.20 : x
  2. Step 2: Convert to fraction form
    3,981,664.20/5,972,496.30 = 989,848.20/x
  3. Step 3: Cross multiply
    3,981,664.20x = 5,972,496.30 × 989,848.20
  4. Step 4: Simplify right side
    3,981,664.20x = 5,911,864,712,061.66
  5. Step 5: Solve for x
    x = 5,911,864,712,061.66/3,981,664.20
  6. Step 6: Final answer
    x = 1,484,772.30

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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.