Home / 1,989.10-2,976.15-1,787.00

Finding the Fourth Proportional to 1,989.10, 2,976.15 and 1,787.00

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Solution

The fourth proportional to 1,989.10, 2,976.15 and 1,787.00 is: 2,673.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.10 : 2,976.15 = 1,787.00 : x
  2. Step 2: Convert to fraction form
    1,989.10/2,976.15 = 1,787.00/x
  3. Step 3: Cross multiply
    1,989.10x = 2,976.15 × 1,787.00
  4. Step 4: Simplify right side
    1,989.10x = 5,318,387.49
  5. Step 5: Solve for x
    x = 5,318,387.49/1,989.10
  6. Step 6: Final answer
    x = 2,673.77

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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.