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Finding the Fourth Proportional to 1,992,425.05, 2,749,758.42 and 1,218,508.66

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Solution

The fourth proportional to 1,992,425.05, 2,749,758.42 and 1,218,508.66 is: 1,681,671.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,992,425.05 : 2,749,758.42 = 1,218,508.66 : x
  2. Step 2: Convert to fraction form
    1,992,425.05/2,749,758.42 = 1,218,508.66/x
  3. Step 3: Cross multiply
    1,992,425.05x = 2,749,758.42 × 1,218,508.66
  4. Step 4: Simplify right side
    1,992,425.05x = 3,350,604,447,677.92
  5. Step 5: Solve for x
    x = 3,350,604,447,677.92/1,992,425.05
  6. Step 6: Final answer
    x = 1,681,671.51

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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.