Home / 1,969.80-2,719.34-1,307.76

Finding the Fourth Proportional to 1,969.80, 2,719.34 and 1,307.76

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Solution

The fourth proportional to 1,969.80, 2,719.34 and 1,307.76 is: 1,805.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,969.80 : 2,719.34 = 1,307.76 : x
  2. Step 2: Convert to fraction form
    1,969.80/2,719.34 = 1,307.76/x
  3. Step 3: Cross multiply
    1,969.80x = 2,719.34 × 1,307.76
  4. Step 4: Simplify right side
    1,969.80x = 3,556,244.08
  5. Step 5: Solve for x
    x = 3,556,244.08/1,969.80
  6. Step 6: Final answer
    x = 1,805.38

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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.