Home / 428,652.33-643,013.46-215,310.48

Finding the Fourth Proportional to 428,652.33, 643,013.46 and 215,310.48

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Solution

The fourth proportional to 428,652.33, 643,013.46 and 215,310.48 is: 322,983.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,652.33 : 643,013.46 = 215,310.48 : x
  2. Step 2: Convert to fraction form
    428,652.33/643,013.46 = 215,310.48/x
  3. Step 3: Cross multiply
    428,652.33x = 643,013.46 × 215,310.48
  4. Step 4: Simplify right side
    428,652.33x = 138,447,536,719.06
  5. Step 5: Solve for x
    x = 138,447,536,719.06/428,652.33
  6. Step 6: Final answer
    x = 322,983.28

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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.