Home / 428,972.12-591,961.79-235,375.58

Finding the Fourth Proportional to 428,972.12, 591,961.79 and 235,375.58

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Solution

The fourth proportional to 428,972.12, 591,961.79 and 235,375.58 is: 324,807.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    428,972.12 : 591,961.79 = 235,375.58 : x
  2. Step 2: Convert to fraction form
    428,972.12/591,961.79 = 235,375.58/x
  3. Step 3: Cross multiply
    428,972.12x = 591,961.79 × 235,375.58
  4. Step 4: Simplify right side
    428,972.12x = 139,333,349,659.09
  5. Step 5: Solve for x
    x = 139,333,349,659.09/428,972.12
  6. Step 6: Final answer
    x = 324,807.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.