Home / 1,392,854.37-1,917,242.78-1,220,365.68

Finding the Fourth Proportional to 1,392,854.37, 1,917,242.78 and 1,220,365.68

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Solution

The fourth proportional to 1,392,854.37, 1,917,242.78 and 1,220,365.68 is: 1,679,814.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,854.37 : 1,917,242.78 = 1,220,365.68 : x
  2. Step 2: Convert to fraction form
    1,392,854.37/1,917,242.78 = 1,220,365.68/x
  3. Step 3: Cross multiply
    1,392,854.37x = 1,917,242.78 × 1,220,365.68
  4. Step 4: Simplify right side
    1,392,854.37x = 2,339,737,282,837.96
  5. Step 5: Solve for x
    x = 2,339,737,282,837.96/1,392,854.37
  6. Step 6: Final answer
    x = 1,679,814.73

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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.