Home / 428,546.36-642,939.90-158,670.44

Finding the Fourth Proportional to 428,546.36, 642,939.90 and 158,670.44

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Solution

The fourth proportional to 428,546.36, 642,939.90 and 158,670.44 is: 238,050.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,546.36 : 642,939.90 = 158,670.44 : x
  2. Step 2: Convert to fraction form
    428,546.36/642,939.90 = 158,670.44/x
  3. Step 3: Cross multiply
    428,546.36x = 642,939.90 × 158,670.44
  4. Step 4: Simplify right side
    428,546.36x = 102,015,556,826.56
  5. Step 5: Solve for x
    x = 102,015,556,826.56/428,546.36
  6. Step 6: Final answer
    x = 238,050.22

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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.