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Finding the Fourth Proportional to 1,989.71, 2,737.82 and 1,673.81

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Solution

The fourth proportional to 1,989.71, 2,737.82 and 1,673.81 is: 2,303.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.71 : 2,737.82 = 1,673.81 : x
  2. Step 2: Convert to fraction form
    1,989.71/2,737.82 = 1,673.81/x
  3. Step 3: Cross multiply
    1,989.71x = 2,737.82 × 1,673.81
  4. Step 4: Simplify right side
    1,989.71x = 4,582,580.99
  5. Step 5: Solve for x
    x = 4,582,580.99/1,989.71
  6. Step 6: Final answer
    x = 2,303.15

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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.