Home / 428,216.68-642,335.46-143,911.42

Finding the Fourth Proportional to 428,216.68, 642,335.46 and 143,911.42

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Solution

The fourth proportional to 428,216.68, 642,335.46 and 143,911.42 is: 215,870.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,216.68 : 642,335.46 = 143,911.42 : x
  2. Step 2: Convert to fraction form
    428,216.68/642,335.46 = 143,911.42/x
  3. Step 3: Cross multiply
    428,216.68x = 642,335.46 × 143,911.42
  4. Step 4: Simplify right side
    428,216.68x = 92,439,408,164.95
  5. Step 5: Solve for x
    x = 92,439,408,164.95/428,216.68
  6. Step 6: Final answer
    x = 215,870.64

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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.