Home / 1,188,228.10-1,639,755.15-644,363.72

Finding the Fourth Proportional to 1,188,228.10, 1,639,755.15 and 644,363.72

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Solution

The fourth proportional to 1,188,228.10, 1,639,755.15 and 644,363.72 is: 889,222.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,228.10 : 1,639,755.15 = 644,363.72 : x
  2. Step 2: Convert to fraction form
    1,188,228.10/1,639,755.15 = 644,363.72/x
  3. Step 3: Cross multiply
    1,188,228.10x = 1,639,755.15 × 644,363.72
  4. Step 4: Simplify right side
    1,188,228.10x = 1,056,598,728,343.16
  5. Step 5: Solve for x
    x = 1,056,598,728,343.16/1,188,228.10
  6. Step 6: Final answer
    x = 889,222.14

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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.