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Finding the Fourth Proportional to 1,287,494.02, 1,775,933.57 and 763,833.88

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Solution

The fourth proportional to 1,287,494.02, 1,775,933.57 and 763,833.88 is: 1,053,611.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,494.02 : 1,775,933.57 = 763,833.88 : x
  2. Step 2: Convert to fraction form
    1,287,494.02/1,775,933.57 = 763,833.88/x
  3. Step 3: Cross multiply
    1,287,494.02x = 1,775,933.57 × 763,833.88
  4. Step 4: Simplify right side
    1,287,494.02x = 1,356,518,233,190.73
  5. Step 5: Solve for x
    x = 1,356,518,233,190.73/1,287,494.02
  6. Step 6: Final answer
    x = 1,053,611.29

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.