Home / 1,188,309.52-1,639,867.98-644,445.28

Finding the Fourth Proportional to 1,188,309.52, 1,639,867.98 and 644,445.28

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Solution

The fourth proportional to 1,188,309.52, 1,639,867.98 and 644,445.28 is: 889,334.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,309.52 : 1,639,867.98 = 644,445.28 : x
  2. Step 2: Convert to fraction form
    1,188,309.52/1,639,867.98 = 644,445.28/x
  3. Step 3: Cross multiply
    1,188,309.52x = 1,639,867.98 × 644,445.28
  4. Step 4: Simplify right side
    1,188,309.52x = 1,056,805,179,534.13
  5. Step 5: Solve for x
    x = 1,056,805,179,534.13/1,188,309.52
  6. Step 6: Final answer
    x = 889,334.94

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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.