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Finding the Fourth Proportional to 310,257.88, 428,144.46 and 189,601.08

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Solution

The fourth proportional to 310,257.88, 428,144.46 and 189,601.08 is: 261,642.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,257.88 : 428,144.46 = 189,601.08 : x
  2. Step 2: Convert to fraction form
    310,257.88/428,144.46 = 189,601.08/x
  3. Step 3: Cross multiply
    310,257.88x = 428,144.46 × 189,601.08
  4. Step 4: Simplify right side
    310,257.88x = 81,176,652,012.02
  5. Step 5: Solve for x
    x = 81,176,652,012.02/310,257.88
  6. Step 6: Final answer
    x = 261,642.51

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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.