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Finding the Fourth Proportional to 351,757.50, 485,241.72 and 215,821.77

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Solution

The fourth proportional to 351,757.50, 485,241.72 and 215,821.77 is: 297,721.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    351,757.50 : 485,241.72 = 215,821.77 : x
  2. Step 2: Convert to fraction form
    351,757.50/485,241.72 = 215,821.77/x
  3. Step 3: Cross multiply
    351,757.50x = 485,241.72 × 215,821.77
  4. Step 4: Simplify right side
    351,757.50x = 104,725,726,888.24
  5. Step 5: Solve for x
    x = 104,725,726,888.24/351,757.50
  6. Step 6: Final answer
    x = 297,721.38

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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.