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Finding the Fourth Proportional to 310,118.18, 428,029.79 and 189,233.60

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Solution

The fourth proportional to 310,118.18, 428,029.79 and 189,233.60 is: 261,183.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,118.18 : 428,029.79 = 189,233.60 : x
  2. Step 2: Convert to fraction form
    310,118.18/428,029.79 = 189,233.60/x
  3. Step 3: Cross multiply
    310,118.18x = 428,029.79 × 189,233.60
  4. Step 4: Simplify right side
    310,118.18x = 80,997,614,982.63
  5. Step 5: Solve for x
    x = 80,997,614,982.63/310,118.18
  6. Step 6: Final answer
    x = 261,183.06

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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.