Home / 1,188,212.13-1,639,733.20-644,347.78

Finding the Fourth Proportional to 1,188,212.13, 1,639,733.20 and 644,347.78

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Solution

The fourth proportional to 1,188,212.13, 1,639,733.20 and 644,347.78 is: 889,200.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,212.13 : 1,639,733.20 = 644,347.78 : x
  2. Step 2: Convert to fraction form
    1,188,212.13/1,639,733.20 = 644,347.78/x
  3. Step 3: Cross multiply
    1,188,212.13x = 1,639,733.20 × 644,347.78
  4. Step 4: Simplify right side
    1,188,212.13x = 1,056,558,441,502.09
  5. Step 5: Solve for x
    x = 1,056,558,441,502.09/1,188,212.13
  6. Step 6: Final answer
    x = 889,200.18

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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.