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Finding the Fourth Proportional to 4,664.09, 6,989.42 and 2,689.64

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Solution

The fourth proportional to 4,664.09, 6,989.42 and 2,689.64 is: 4,030.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,664.09 : 6,989.42 = 2,689.64 : x
  2. Step 2: Convert to fraction form
    4,664.09/6,989.42 = 2,689.64/x
  3. Step 3: Cross multiply
    4,664.09x = 6,989.42 × 2,689.64
  4. Step 4: Simplify right side
    4,664.09x = 18,799,023.61
  5. Step 5: Solve for x
    x = 18,799,023.61/4,664.09
  6. Step 6: Final answer
    x = 4,030.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.