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Finding the Fourth Proportional to 3,360.72, 4,636.44 and 2,118

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Solution

The fourth proportional to 3,360.72, 4,636.44 and 2,118 is: 2,921.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,360.72 : 4,636.44 = 2,118 : x
  2. Step 2: Convert to fraction form
    3,360.72/4,636.44 = 2,118/x
  3. Step 3: Cross multiply
    3,360.72x = 4,636.44 × 2,118
  4. Step 4: Simplify right side
    3,360.72x = 9,819,979.92
  5. Step 5: Solve for x
    x = 9,819,979.92/3,360.72
  6. Step 6: Final answer
    x = 2,921.99

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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.