Home / 3,391.65-5,085.89-1,312.64

Finding the Fourth Proportional to 3,391.65, 5,085.89 and 1,312.64

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Solution

The fourth proportional to 3,391.65, 5,085.89 and 1,312.64 is: 1,968.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,391.65 : 5,085.89 = 1,312.64 : x
  2. Step 2: Convert to fraction form
    3,391.65/5,085.89 = 1,312.64/x
  3. Step 3: Cross multiply
    3,391.65x = 5,085.89 × 1,312.64
  4. Step 4: Simplify right side
    3,391.65x = 6,675,910.66
  5. Step 5: Solve for x
    x = 6,675,910.66/3,391.65
  6. Step 6: Final answer
    x = 1,968.34

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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.