Home / 3,391.90-5,087.51-1,311.86

Finding the Fourth Proportional to 3,391.90, 5,087.51 and 1,311.86

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Solution

The fourth proportional to 3,391.90, 5,087.51 and 1,311.86 is: 1,967.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.90 : 5,087.51 = 1,311.86 : x
  2. Step 2: Convert to fraction form
    3,391.90/5,087.51 = 1,311.86/x
  3. Step 3: Cross multiply
    3,391.90x = 5,087.51 × 1,311.86
  4. Step 4: Simplify right side
    3,391.90x = 6,674,090.48
  5. Step 5: Solve for x
    x = 6,674,090.48/3,391.90
  6. Step 6: Final answer
    x = 1,967.66

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1.5x scale

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.