Home / 428,176.67-642,275.39-143,871.29

Finding the Fourth Proportional to 428,176.67, 642,275.39 and 143,871.29

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Solution

The fourth proportional to 428,176.67, 642,275.39 and 143,871.29 is: 215,810.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,176.67 : 642,275.39 = 143,871.29 : x
  2. Step 2: Convert to fraction form
    428,176.67/642,275.39 = 143,871.29/x
  3. Step 3: Cross multiply
    428,176.67x = 642,275.39 × 143,871.29
  4. Step 4: Simplify right side
    428,176.67x = 92,404,988,451.39
  5. Step 5: Solve for x
    x = 92,404,988,451.39/428,176.67
  6. Step 6: Final answer
    x = 215,810.43

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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.