Home / 990,821.72-1,367,418.30-561,178.28

Finding the Fourth Proportional to 990,821.72, 1,367,418.30 and 561,178.28

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Solution

The fourth proportional to 990,821.72, 1,367,418.30 and 561,178.28 is: 774,473.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    990,821.72 : 1,367,418.30 = 561,178.28 : x
  2. Step 2: Convert to fraction form
    990,821.72/1,367,418.30 = 561,178.28/x
  3. Step 3: Cross multiply
    990,821.72x = 1,367,418.30 × 561,178.28
  4. Step 4: Simplify right side
    990,821.72x = 767,365,449,634.52
  5. Step 5: Solve for x
    x = 767,365,449,634.52/990,821.72
  6. Step 6: Final answer
    x = 774,473.79

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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.