Home / 1,188,778.53-1,640,669.10-665,688.34

Finding the Fourth Proportional to 1,188,778.53, 1,640,669.10 and 665,688.34

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Solution

The fourth proportional to 1,188,778.53, 1,640,669.10 and 665,688.34 is: 918,736.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,188,778.53 : 1,640,669.10 = 665,688.34 : x
  2. Step 2: Convert to fraction form
    1,188,778.53/1,640,669.10 = 665,688.34/x
  3. Step 3: Cross multiply
    1,188,778.53x = 1,640,669.10 × 665,688.34
  4. Step 4: Simplify right side
    1,188,778.53x = 1,092,174,286,339.85
  5. Step 5: Solve for x
    x = 1,092,174,286,339.85/1,188,778.53
  6. Step 6: Final answer
    x = 918,736.55

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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.