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Finding the Fourth Proportional to 5,738.65, 7,919.74 and 3,221.00

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Solution

The fourth proportional to 5,738.65, 7,919.74 and 3,221.00 is: 4,445.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,738.65 : 7,919.74 = 3,221.00 : x
  2. Step 2: Convert to fraction form
    5,738.65/7,919.74 = 3,221.00/x
  3. Step 3: Cross multiply
    5,738.65x = 7,919.74 × 3,221.00
  4. Step 4: Simplify right side
    5,738.65x = 25,509,476.67
  5. Step 5: Solve for x
    x = 25,509,476.67/5,738.65
  6. Step 6: Final answer
    x = 4,445.21

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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.