Home / 428,449.02-642,227.76-143,928.42

Finding the Fourth Proportional to 428,449.02, 642,227.76 and 143,928.42

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Solution

The fourth proportional to 428,449.02, 642,227.76 and 143,928.42 is: 215,742.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,449.02 : 642,227.76 = 143,928.42 : x
  2. Step 2: Convert to fraction form
    428,449.02/642,227.76 = 143,928.42/x
  3. Step 3: Cross multiply
    428,449.02x = 642,227.76 × 143,928.42
  4. Step 4: Simplify right side
    428,449.02x = 92,434,826,776.94
  5. Step 5: Solve for x
    x = 92,434,826,776.94/428,449.02
  6. Step 6: Final answer
    x = 215,742.88

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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.