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Finding the Fourth Proportional to 2,125.38, 3,188.78 and 739.07

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Solution

The fourth proportional to 2,125.38, 3,188.78 and 739.07 is: 1,108.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,125.38 : 3,188.78 = 739.07 : x
  2. Step 2: Convert to fraction form
    2,125.38/3,188.78 = 739.07/x
  3. Step 3: Cross multiply
    2,125.38x = 3,188.78 × 739.07
  4. Step 4: Simplify right side
    2,125.38x = 2,356,731.63
  5. Step 5: Solve for x
    x = 2,356,731.63/2,125.38
  6. Step 6: Final answer
    x = 1,108.85

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1.5x scale

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.