Home / 1,288.24-1,931.94-518.56

Finding the Fourth Proportional to 1,288.24, 1,931.94 and 518.56

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Solution

The fourth proportional to 1,288.24, 1,931.94 and 518.56 is: 777.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,288.24 : 1,931.94 = 518.56 : x
  2. Step 2: Convert to fraction form
    1,288.24/1,931.94 = 518.56/x
  3. Step 3: Cross multiply
    1,288.24x = 1,931.94 × 518.56
  4. Step 4: Simplify right side
    1,288.24x = 1,001,826.81
  5. Step 5: Solve for x
    x = 1,001,826.81/1,288.24
  6. Step 6: Final answer
    x = 777.67

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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.