Home / 428,685.10-643,027.82-158,906.00

Finding the Fourth Proportional to 428,685.10, 643,027.82 and 158,906.00

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Solution

The fourth proportional to 428,685.10, 643,027.82 and 158,906.00 is: 238,359.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,685.10 : 643,027.82 = 158,906.00 : x
  2. Step 2: Convert to fraction form
    428,685.10/643,027.82 = 158,906.00/x
  3. Step 3: Cross multiply
    428,685.10x = 643,027.82 × 158,906.00
  4. Step 4: Simplify right side
    428,685.10x = 102,180,979,577.96
  5. Step 5: Solve for x
    x = 102,180,979,577.96/428,685.10
  6. Step 6: Final answer
    x = 238,359.07

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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.