Home / 428,534.30-642,845.19-148,015.10

Finding the Fourth Proportional to 428,534.30, 642,845.19 and 148,015.10

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Solution

The fourth proportional to 428,534.30, 642,845.19 and 148,015.10 is: 222,037.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,534.30 : 642,845.19 = 148,015.10 : x
  2. Step 2: Convert to fraction form
    428,534.30/642,845.19 = 148,015.10/x
  3. Step 3: Cross multiply
    428,534.30x = 642,845.19 × 148,015.10
  4. Step 4: Simplify right side
    428,534.30x = 95,150,795,082.37
  5. Step 5: Solve for x
    x = 95,150,795,082.37/428,534.30
  6. Step 6: Final answer
    x = 222,037.76

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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.