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Finding the Fourth Proportional to 1,989.94, 2,986.90 and 1,470.54

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Solution

The fourth proportional to 1,989.94, 2,986.90 and 1,470.54 is: 2,207.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,989.94 : 2,986.90 = 1,470.54 : x
  2. Step 2: Convert to fraction form
    1,989.94/2,986.90 = 1,470.54/x
  3. Step 3: Cross multiply
    1,989.94x = 2,986.90 × 1,470.54
  4. Step 4: Simplify right side
    1,989.94x = 4,392,355.93
  5. Step 5: Solve for x
    x = 4,392,355.93/1,989.94
  6. Step 6: Final answer
    x = 2,207.28

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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.