Home / 1,290,407.49-1,780,862.09-774,180.81

Finding the Fourth Proportional to 1,290,407.49, 1,780,862.09 and 774,180.81

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Solution

The fourth proportional to 1,290,407.49, 1,780,862.09 and 774,180.81 is: 1,068,429.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,290,407.49 : 1,780,862.09 = 774,180.81 : x
  2. Step 2: Convert to fraction form
    1,290,407.49/1,780,862.09 = 774,180.81/x
  3. Step 3: Cross multiply
    1,290,407.49x = 1,780,862.09 × 774,180.81
  4. Step 4: Simplify right side
    1,290,407.49x = 1,378,709,251,463.59
  5. Step 5: Solve for x
    x = 1,378,709,251,463.59/1,290,407.49
  6. Step 6: Final answer
    x = 1,068,429.36

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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.