Home / 3,389.90-5,085.63-1,309.93

Finding the Fourth Proportional to 3,389.90, 5,085.63 and 1,309.93

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Solution

The fourth proportional to 3,389.90, 5,085.63 and 1,309.93 is: 1,965.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,389.90 : 5,085.63 = 1,309.93 : x
  2. Step 2: Convert to fraction form
    3,389.90/5,085.63 = 1,309.93/x
  3. Step 3: Cross multiply
    3,389.90x = 5,085.63 × 1,309.93
  4. Step 4: Simplify right side
    3,389.90x = 6,661,806.59
  5. Step 5: Solve for x
    x = 6,661,806.59/3,389.90
  6. Step 6: Final answer
    x = 1,965.19

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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.