Home / 1,979.49-2,974.63-1,055.72

Finding the Fourth Proportional to 1,979.49, 2,974.63 and 1,055.72

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Solution

The fourth proportional to 1,979.49, 2,974.63 and 1,055.72 is: 1,586.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.49 : 2,974.63 = 1,055.72 : x
  2. Step 2: Convert to fraction form
    1,979.49/2,974.63 = 1,055.72/x
  3. Step 3: Cross multiply
    1,979.49x = 2,974.63 × 1,055.72
  4. Step 4: Simplify right side
    1,979.49x = 3,140,358.87
  5. Step 5: Solve for x
    x = 3,140,358.87/1,979.49
  6. Step 6: Final answer
    x = 1,586.45

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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.