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Finding the Fourth Proportional to 3,118.50, 4,303.53 and 1,721.25

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Solution

The fourth proportional to 3,118.50, 4,303.53 and 1,721.25 is: 2,375.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.50 : 4,303.53 = 1,721.25 : x
  2. Step 2: Convert to fraction form
    3,118.50/4,303.53 = 1,721.25/x
  3. Step 3: Cross multiply
    3,118.50x = 4,303.53 × 1,721.25
  4. Step 4: Simplify right side
    3,118.50x = 7,407,451.01
  5. Step 5: Solve for x
    x = 7,407,451.01/3,118.50
  6. Step 6: Final answer
    x = 2,375.33

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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.