Home / 1,311.36-1,966.65-531.20

Finding the Fourth Proportional to 1,311.36, 1,966.65 and 531.20

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Solution

The fourth proportional to 1,311.36, 1,966.65 and 531.20 is: 796.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.36 : 1,966.65 = 531.20 : x
  2. Step 2: Convert to fraction form
    1,311.36/1,966.65 = 531.20/x
  3. Step 3: Cross multiply
    1,311.36x = 1,966.65 × 531.20
  4. Step 4: Simplify right side
    1,311.36x = 1,044,674.65
  5. Step 5: Solve for x
    x = 1,044,674.65/1,311.36
  6. Step 6: Final answer
    x = 796.63

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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.