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Finding the Fourth Proportional to 3,612.43, 4,978.26 and 2,491.32

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Solution

The fourth proportional to 3,612.43, 4,978.26 and 2,491.32 is: 3,433.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,612.43 : 4,978.26 = 2,491.32 : x
  2. Step 2: Convert to fraction form
    3,612.43/4,978.26 = 2,491.32/x
  3. Step 3: Cross multiply
    3,612.43x = 4,978.26 × 2,491.32
  4. Step 4: Simplify right side
    3,612.43x = 12,402,457.37
  5. Step 5: Solve for x
    x = 12,402,457.37/3,612.43
  6. Step 6: Final answer
    x = 3,433.27

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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.