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Finding the Fourth Proportional to 1,777.54, 2,664.37 and 911.90

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Solution

The fourth proportional to 1,777.54, 2,664.37 and 911.90 is: 1,366.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,777.54 : 2,664.37 = 911.90 : x
  2. Step 2: Convert to fraction form
    1,777.54/2,664.37 = 911.90/x
  3. Step 3: Cross multiply
    1,777.54x = 2,664.37 × 911.90
  4. Step 4: Simplify right side
    1,777.54x = 2,429,639.00
  5. Step 5: Solve for x
    x = 2,429,639.00/1,777.54
  6. Step 6: Final answer
    x = 1,366.85

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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.