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Finding the Fourth Proportional to 2,621, 3,617.79 and 1,689.50

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Solution

The fourth proportional to 2,621, 3,617.79 and 1,689.50 is: 2,332.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621 : 3,617.79 = 1,689.50 : x
  2. Step 2: Convert to fraction form
    2,621/3,617.79 = 1,689.50/x
  3. Step 3: Cross multiply
    2,621x = 3,617.79 × 1,689.50
  4. Step 4: Simplify right side
    2,621x = 6,112,256.21
  5. Step 5: Solve for x
    x = 6,112,256.21/2,621
  6. Step 6: Final answer
    x = 2,332.03

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.