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Finding the Fourth Proportional to 781,761, 1,172,646.36 and 220,800.36

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Solution

The fourth proportional to 781,761, 1,172,646.36 and 220,800.36 is: 331,201.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    781,761 : 1,172,646.36 = 220,800.36 : x
  2. Step 2: Convert to fraction form
    781,761/1,172,646.36 = 220,800.36/x
  3. Step 3: Cross multiply
    781,761x = 1,172,646.36 × 220,800.36
  4. Step 4: Simplify right side
    781,761x = 258,920,738,440.69
  5. Step 5: Solve for x
    x = 258,920,738,440.69/781,761
  6. Step 6: Final answer
    x = 331,201.91

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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.