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Finding the Fourth Proportional to 661,091.90, 911,995.22 and 479,405.26

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Solution

The fourth proportional to 661,091.90, 911,995.22 and 479,405.26 is: 661,353.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,091.90 : 911,995.22 = 479,405.26 : x
  2. Step 2: Convert to fraction form
    661,091.90/911,995.22 = 479,405.26/x
  3. Step 3: Cross multiply
    661,091.90x = 911,995.22 × 479,405.26
  4. Step 4: Simplify right side
    661,091.90x = 437,215,305,562.86
  5. Step 5: Solve for x
    x = 437,215,305,562.86/661,091.90
  6. Step 6: Final answer
    x = 661,353.29

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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.