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Finding the Fourth Proportional to 1,320,689.73, 1,822,559.10 and 717,077.73

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Solution

The fourth proportional to 1,320,689.73, 1,822,559.10 and 717,077.73 is: 989,571.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,320,689.73 : 1,822,559.10 = 717,077.73 : x
  2. Step 2: Convert to fraction form
    1,320,689.73/1,822,559.10 = 717,077.73/x
  3. Step 3: Cross multiply
    1,320,689.73x = 1,822,559.10 × 717,077.73
  4. Step 4: Simplify right side
    1,320,689.73x = 1,306,916,542,218.84
  5. Step 5: Solve for x
    x = 1,306,916,542,218.84/1,320,689.73
  6. Step 6: Final answer
    x = 989,571.22

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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.