Home / 428,229.72-642,354.96-143,924.40

Finding the Fourth Proportional to 428,229.72, 642,354.96 and 143,924.40

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Solution

The fourth proportional to 428,229.72, 642,354.96 and 143,924.40 is: 215,890.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,229.72 : 642,354.96 = 143,924.40 : x
  2. Step 2: Convert to fraction form
    428,229.72/642,354.96 = 143,924.40/x
  3. Step 3: Cross multiply
    428,229.72x = 642,354.96 × 143,924.40
  4. Step 4: Simplify right side
    428,229.72x = 92,450,552,205.02
  5. Step 5: Solve for x
    x = 92,450,552,205.02/428,229.72
  6. Step 6: Final answer
    x = 215,890.09

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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.