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Finding the Fourth Proportional to 911,993.92, 1,368,014.40 and 432,109.12

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Solution

The fourth proportional to 911,993.92, 1,368,014.40 and 432,109.12 is: 648,174.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    911,993.92 : 1,368,014.40 = 432,109.12 : x
  2. Step 2: Convert to fraction form
    911,993.92/1,368,014.40 = 432,109.12/x
  3. Step 3: Cross multiply
    911,993.92x = 1,368,014.40 × 432,109.12
  4. Step 4: Simplify right side
    911,993.92x = 591,131,498,531.33
  5. Step 5: Solve for x
    x = 591,131,498,531.33/911,993.92
  6. Step 6: Final answer
    x = 648,174.82

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.