Home / 1,988,796.20-2,981,196.75-639,967.46

Finding the Fourth Proportional to 1,988,796.20, 2,981,196.75 and 639,967.46

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Solution

The fourth proportional to 1,988,796.20, 2,981,196.75 and 639,967.46 is: 959,308.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,988,796.20 : 2,981,196.75 = 639,967.46 : x
  2. Step 2: Convert to fraction form
    1,988,796.20/2,981,196.75 = 639,967.46/x
  3. Step 3: Cross multiply
    1,988,796.20x = 2,981,196.75 × 639,967.46
  4. Step 4: Simplify right side
    1,988,796.20x = 1,907,868,911,857.76
  5. Step 5: Solve for x
    x = 1,907,868,911,857.76/1,988,796.20
  6. Step 6: Final answer
    x = 959,308.41

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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.