Home / 1,330.71-1,994.85-1,126.59

Finding the Fourth Proportional to 1,330.71, 1,994.85 and 1,126.59

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Solution

The fourth proportional to 1,330.71, 1,994.85 and 1,126.59 is: 1,688.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,330.71 : 1,994.85 = 1,126.59 : x
  2. Step 2: Convert to fraction form
    1,330.71/1,994.85 = 1,126.59/x
  3. Step 3: Cross multiply
    1,330.71x = 1,994.85 × 1,126.59
  4. Step 4: Simplify right side
    1,330.71x = 2,247,378.06
  5. Step 5: Solve for x
    x = 2,247,378.06/1,330.71
  6. Step 6: Final answer
    x = 1,688.86

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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.