Home / 1,261.04-1,889.94-712.40

Finding the Fourth Proportional to 1,261.04, 1,889.94 and 712.40

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Solution

The fourth proportional to 1,261.04, 1,889.94 and 712.40 is: 1,067.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.04 : 1,889.94 = 712.40 : x
  2. Step 2: Convert to fraction form
    1,261.04/1,889.94 = 712.40/x
  3. Step 3: Cross multiply
    1,261.04x = 1,889.94 × 712.40
  4. Step 4: Simplify right side
    1,261.04x = 1,346,393.26
  5. Step 5: Solve for x
    x = 1,346,393.26/1,261.04
  6. Step 6: Final answer
    x = 1,067.68

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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.