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Finding the Fourth Proportional to 1,261.15, 1,740.72 and 888.24

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Solution

The fourth proportional to 1,261.15, 1,740.72 and 888.24 is: 1,226.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.15 : 1,740.72 = 888.24 : x
  2. Step 2: Convert to fraction form
    1,261.15/1,740.72 = 888.24/x
  3. Step 3: Cross multiply
    1,261.15x = 1,740.72 × 888.24
  4. Step 4: Simplify right side
    1,261.15x = 1,546,177.13
  5. Step 5: Solve for x
    x = 1,546,177.13/1,261.15
  6. Step 6: Final answer
    x = 1,226.01

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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.