Home / 1,311.15-1,967.01-433.69

Finding the Fourth Proportional to 1,311.15, 1,967.01 and 433.69

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Solution

The fourth proportional to 1,311.15, 1,967.01 and 433.69 is: 650.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,311.15 : 1,967.01 = 433.69 : x
  2. Step 2: Convert to fraction form
    1,311.15/1,967.01 = 433.69/x
  3. Step 3: Cross multiply
    1,311.15x = 1,967.01 × 433.69
  4. Step 4: Simplify right side
    1,311.15x = 853,072.57
  5. Step 5: Solve for x
    x = 853,072.57/1,311.15
  6. Step 6: Final answer
    x = 650.63

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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.