Home / 1,261.18-1,889.37-711.70

Finding the Fourth Proportional to 1,261.18, 1,889.37 and 711.70

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Solution

The fourth proportional to 1,261.18, 1,889.37 and 711.70 is: 1,066.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,261.18 : 1,889.37 = 711.70 : x
  2. Step 2: Convert to fraction form
    1,261.18/1,889.37 = 711.70/x
  3. Step 3: Cross multiply
    1,261.18x = 1,889.37 × 711.70
  4. Step 4: Simplify right side
    1,261.18x = 1,344,664.63
  5. Step 5: Solve for x
    x = 1,344,664.63/1,261.18
  6. Step 6: Final answer
    x = 1,066.20

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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.