Home / 3,391.53-5,086.80-1,312.51

Finding the Fourth Proportional to 3,391.53, 5,086.80 and 1,312.51

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Solution

The fourth proportional to 3,391.53, 5,086.80 and 1,312.51 is: 1,968.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.53 : 5,086.80 = 1,312.51 : x
  2. Step 2: Convert to fraction form
    3,391.53/5,086.80 = 1,312.51/x
  3. Step 3: Cross multiply
    3,391.53x = 5,086.80 × 1,312.51
  4. Step 4: Simplify right side
    3,391.53x = 6,676,475.87
  5. Step 5: Solve for x
    x = 6,676,475.87/3,391.53
  6. Step 6: Final answer
    x = 1,968.58

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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.