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Finding the Fourth Proportional to 3,118.36, 4,303.38 and 1,721.14

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Solution

The fourth proportional to 3,118.36, 4,303.38 and 1,721.14 is: 2,375.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,118.36 : 4,303.38 = 1,721.14 : x
  2. Step 2: Convert to fraction form
    3,118.36/4,303.38 = 1,721.14/x
  3. Step 3: Cross multiply
    3,118.36x = 4,303.38 × 1,721.14
  4. Step 4: Simplify right side
    3,118.36x = 7,406,719.45
  5. Step 5: Solve for x
    x = 7,406,719.45/3,118.36
  6. Step 6: Final answer
    x = 2,375.20

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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.