Home / 3,389.90-5,081.31-1,309.32

Finding the Fourth Proportional to 3,389.90, 5,081.31 and 1,309.32

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Solution

The fourth proportional to 3,389.90, 5,081.31 and 1,309.32 is: 1,962.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.90 : 5,081.31 = 1,309.32 : x
  2. Step 2: Convert to fraction form
    3,389.90/5,081.31 = 1,309.32/x
  3. Step 3: Cross multiply
    3,389.90x = 5,081.31 × 1,309.32
  4. Step 4: Simplify right side
    3,389.90x = 6,653,060.81
  5. Step 5: Solve for x
    x = 6,653,060.81/3,389.90
  6. Step 6: Final answer
    x = 1,962.62

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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.