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Finding the Fourth Proportional to 3,118.68, 4,303.62 and 1,721.16

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Solution

The fourth proportional to 3,118.68, 4,303.62 and 1,721.16 is: 2,375.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.68 : 4,303.62 = 1,721.16 : x
  2. Step 2: Convert to fraction form
    3,118.68/4,303.62 = 1,721.16/x
  3. Step 3: Cross multiply
    3,118.68x = 4,303.62 × 1,721.16
  4. Step 4: Simplify right side
    3,118.68x = 7,407,218.60
  5. Step 5: Solve for x
    x = 7,407,218.60/3,118.68
  6. Step 6: Final answer
    x = 2,375.11

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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.