Home / 1,392,297.73-1,921,488.38-780,440.74

Finding the Fourth Proportional to 1,392,297.73, 1,921,488.38 and 780,440.74

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Solution

The fourth proportional to 1,392,297.73, 1,921,488.38 and 780,440.74 is: 1,077,074.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,392,297.73 : 1,921,488.38 = 780,440.74 : x
  2. Step 2: Convert to fraction form
    1,392,297.73/1,921,488.38 = 780,440.74/x
  3. Step 3: Cross multiply
    1,392,297.73x = 1,921,488.38 × 780,440.74
  4. Step 4: Simplify right side
    1,392,297.73x = 1,499,607,807,409.33
  5. Step 5: Solve for x
    x = 1,499,607,807,409.33/1,392,297.73
  6. Step 6: Final answer
    x = 1,077,074.09

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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.