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Finding the Fourth Proportional to 1,989.77, 2,983.62 and 893.19

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Solution

The fourth proportional to 1,989.77, 2,983.62 and 893.19 is: 1,339.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.77 : 2,983.62 = 893.19 : x
  2. Step 2: Convert to fraction form
    1,989.77/2,983.62 = 893.19/x
  3. Step 3: Cross multiply
    1,989.77x = 2,983.62 × 893.19
  4. Step 4: Simplify right side
    1,989.77x = 2,664,949.33
  5. Step 5: Solve for x
    x = 2,664,949.33/1,989.77
  6. Step 6: Final answer
    x = 1,339.33

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1.5x scale

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.