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Finding the Fourth Proportional to 2,637.05, 3,955.67 and 689.19

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Solution

The fourth proportional to 2,637.05, 3,955.67 and 689.19 is: 1,033.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,637.05 : 3,955.67 = 689.19 : x
  2. Step 2: Convert to fraction form
    2,637.05/3,955.67 = 689.19/x
  3. Step 3: Cross multiply
    2,637.05x = 3,955.67 × 689.19
  4. Step 4: Simplify right side
    2,637.05x = 2,726,204.76
  5. Step 5: Solve for x
    x = 2,726,204.76/2,637.05
  6. Step 6: Final answer
    x = 1,033.81

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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.