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Finding the Fourth Proportional to 3,531,309.20, 5,296,963.80 and 871,917.20

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Solution

The fourth proportional to 3,531,309.20, 5,296,963.80 and 871,917.20 is: 1,307,875.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,531,309.20 : 5,296,963.80 = 871,917.20 : x
  2. Step 2: Convert to fraction form
    3,531,309.20/5,296,963.80 = 871,917.20/x
  3. Step 3: Cross multiply
    3,531,309.20x = 5,296,963.80 × 871,917.20
  4. Step 4: Simplify right side
    3,531,309.20x = 4,618,513,844,997.36
  5. Step 5: Solve for x
    x = 4,618,513,844,997.36/3,531,309.20
  6. Step 6: Final answer
    x = 1,307,875.80

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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.