Home / 1,979.85-2,732.16-1,140.55

Finding the Fourth Proportional to 1,979.85, 2,732.16 and 1,140.55

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Solution

The fourth proportional to 1,979.85, 2,732.16 and 1,140.55 is: 1,573.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.85 : 2,732.16 = 1,140.55 : x
  2. Step 2: Convert to fraction form
    1,979.85/2,732.16 = 1,140.55/x
  3. Step 3: Cross multiply
    1,979.85x = 2,732.16 × 1,140.55
  4. Step 4: Simplify right side
    1,979.85x = 3,116,166.36
  5. Step 5: Solve for x
    x = 3,116,166.36/1,979.85
  6. Step 6: Final answer
    x = 1,573.94

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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.