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Finding the Fourth Proportional to 1,393,168.89, 1,922,783.22 and 849,619.98

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Solution

The fourth proportional to 1,393,168.89, 1,922,783.22 and 849,619.98 is: 1,172,603.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,168.89 : 1,922,783.22 = 849,619.98 : x
  2. Step 2: Convert to fraction form
    1,393,168.89/1,922,783.22 = 849,619.98/x
  3. Step 3: Cross multiply
    1,393,168.89x = 1,922,783.22 × 849,619.98
  4. Step 4: Simplify right side
    1,393,168.89x = 1,633,635,040,920.74
  5. Step 5: Solve for x
    x = 1,633,635,040,920.74/1,393,168.89
  6. Step 6: Final answer
    x = 1,172,603.73

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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.