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Finding the Fourth Proportional to 2,381.11, 3,571.67 and 649.74

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Solution

The fourth proportional to 2,381.11, 3,571.67 and 649.74 is: 974.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,381.11 : 3,571.67 = 649.74 : x
  2. Step 2: Convert to fraction form
    2,381.11/3,571.67 = 649.74/x
  3. Step 3: Cross multiply
    2,381.11x = 3,571.67 × 649.74
  4. Step 4: Simplify right side
    2,381.11x = 2,320,656.87
  5. Step 5: Solve for x
    x = 2,320,656.87/2,381.11
  6. Step 6: Final answer
    x = 974.61

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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.