Home / 1,131.28-1,697.27-340.67

Finding the Fourth Proportional to 1,131.28, 1,697.27 and 340.67

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Solution

The fourth proportional to 1,131.28, 1,697.27 and 340.67 is: 511.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,131.28 : 1,697.27 = 340.67 : x
  2. Step 2: Convert to fraction form
    1,131.28/1,697.27 = 340.67/x
  3. Step 3: Cross multiply
    1,131.28x = 1,697.27 × 340.67
  4. Step 4: Simplify right side
    1,131.28x = 578,198.78
  5. Step 5: Solve for x
    x = 578,198.78/1,131.28
  6. Step 6: Final answer
    x = 511.10

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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.