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Finding the Fourth Proportional to 1,261.46, 1,739.39 and 888.32

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Solution

The fourth proportional to 1,261.46, 1,739.39 and 888.32 is: 1,224.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.46 : 1,739.39 = 888.32 : x
  2. Step 2: Convert to fraction form
    1,261.46/1,739.39 = 888.32/x
  3. Step 3: Cross multiply
    1,261.46x = 1,739.39 × 888.32
  4. Step 4: Simplify right side
    1,261.46x = 1,545,121.79
  5. Step 5: Solve for x
    x = 1,545,121.79/1,261.46
  6. Step 6: Final answer
    x = 1,224.87

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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.