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Finding the Fourth Proportional to 316,910.80, 475,265.85 and 103,629.44

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Solution

The fourth proportional to 316,910.80, 475,265.85 and 103,629.44 is: 155,411.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    316,910.80 : 475,265.85 = 103,629.44 : x
  2. Step 2: Convert to fraction form
    316,910.80/475,265.85 = 103,629.44/x
  3. Step 3: Cross multiply
    316,910.80x = 475,265.85 × 103,629.44
  4. Step 4: Simplify right side
    316,910.80x = 49,251,533,555.52
  5. Step 5: Solve for x
    x = 49,251,533,555.52/316,910.80
  6. Step 6: Final answer
    x = 155,411.34

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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.