Home / 428,134.20-642,201.30-262,246.20

Finding the Fourth Proportional to 428,134.20, 642,201.30 and 262,246.20

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Solution

The fourth proportional to 428,134.20, 642,201.30 and 262,246.20 is: 393,369.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,134.20 : 642,201.30 = 262,246.20 : x
  2. Step 2: Convert to fraction form
    428,134.20/642,201.30 = 262,246.20/x
  3. Step 3: Cross multiply
    428,134.20x = 642,201.30 × 262,246.20
  4. Step 4: Simplify right side
    428,134.20x = 168,414,850,560.06
  5. Step 5: Solve for x
    x = 168,414,850,560.06/428,134.20
  6. Step 6: Final answer
    x = 393,369.30

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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.