Home / 1,188,379.08-1,639,958.40-644,512.68

Finding the Fourth Proportional to 1,188,379.08, 1,639,958.40 and 644,512.68

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Solution

The fourth proportional to 1,188,379.08, 1,639,958.40 and 644,512.68 is: 889,424.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,379.08 : 1,639,958.40 = 644,512.68 : x
  2. Step 2: Convert to fraction form
    1,188,379.08/1,639,958.40 = 644,512.68/x
  3. Step 3: Cross multiply
    1,188,379.08x = 1,639,958.40 × 644,512.68
  4. Step 4: Simplify right side
    1,188,379.08x = 1,056,973,983,472.51
  5. Step 5: Solve for x
    x = 1,056,973,983,472.51/1,188,379.08
  6. Step 6: Final answer
    x = 889,424.93

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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.