Home / 1,955.29-2,696.91-1,209.60

Finding the Fourth Proportional to 1,955.29, 2,696.91 and 1,209.60

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Solution

The fourth proportional to 1,955.29, 2,696.91 and 1,209.60 is: 1,668.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,955.29 : 2,696.91 = 1,209.60 : x
  2. Step 2: Convert to fraction form
    1,955.29/2,696.91 = 1,209.60/x
  3. Step 3: Cross multiply
    1,955.29x = 2,696.91 × 1,209.60
  4. Step 4: Simplify right side
    1,955.29x = 3,262,182.34
  5. Step 5: Solve for x
    x = 3,262,182.34/1,955.29
  6. Step 6: Final answer
    x = 1,668.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.