Home / 1,188,616.32-1,640,276.64-644,742

Finding the Fourth Proportional to 1,188,616.32, 1,640,276.64 and 644,742

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Solution

The fourth proportional to 1,188,616.32, 1,640,276.64 and 644,742 is: 889,736.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,616.32 : 1,640,276.64 = 644,742 : x
  2. Step 2: Convert to fraction form
    1,188,616.32/1,640,276.64 = 644,742/x
  3. Step 3: Cross multiply
    1,188,616.32x = 1,640,276.64 × 644,742
  4. Step 4: Simplify right side
    1,188,616.32x = 1,057,555,241,426.88
  5. Step 5: Solve for x
    x = 1,057,555,241,426.88/1,188,616.32
  6. Step 6: Final answer
    x = 889,736.43

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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.