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Finding the Fourth Proportional to 258,405.19, 387,213.10 and 108,563.56

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Solution

The fourth proportional to 258,405.19, 387,213.10 and 108,563.56 is: 162,679.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,405.19 : 387,213.10 = 108,563.56 : x
  2. Step 2: Convert to fraction form
    258,405.19/387,213.10 = 108,563.56/x
  3. Step 3: Cross multiply
    258,405.19x = 387,213.10 × 108,563.56
  4. Step 4: Simplify right side
    258,405.19x = 42,037,231,375.19
  5. Step 5: Solve for x
    x = 42,037,231,375.19/258,405.19
  6. Step 6: Final answer
    x = 162,679.52

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1.5x scale

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.