Home / 1,311.06-1,957.43-1,127.70

Finding the Fourth Proportional to 1,311.06, 1,957.43 and 1,127.70

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Solution

The fourth proportional to 1,311.06, 1,957.43 and 1,127.70 is: 1,683.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.06 : 1,957.43 = 1,127.70 : x
  2. Step 2: Convert to fraction form
    1,311.06/1,957.43 = 1,127.70/x
  3. Step 3: Cross multiply
    1,311.06x = 1,957.43 × 1,127.70
  4. Step 4: Simplify right side
    1,311.06x = 2,207,388.17
  5. Step 5: Solve for x
    x = 2,207,388.17/1,311.06
  6. Step 6: Final answer
    x = 1,683.67

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.