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Finding the Fourth Proportional to 5,718.64, 7,892.43 and 3,480.75

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Solution

The fourth proportional to 5,718.64, 7,892.43 and 3,480.75 is: 4,803.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,718.64 : 7,892.43 = 3,480.75 : x
  2. Step 2: Convert to fraction form
    5,718.64/7,892.43 = 3,480.75/x
  3. Step 3: Cross multiply
    5,718.64x = 7,892.43 × 3,480.75
  4. Step 4: Simplify right side
    5,718.64x = 27,471,575.72
  5. Step 5: Solve for x
    x = 27,471,575.72/5,718.64
  6. Step 6: Final answer
    x = 4,803.87

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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.