Home / 1,979.20-2,970.10-1,055.43

Finding the Fourth Proportional to 1,979.20, 2,970.10 and 1,055.43

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Solution

The fourth proportional to 1,979.20, 2,970.10 and 1,055.43 is: 1,583.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.20 : 2,970.10 = 1,055.43 : x
  2. Step 2: Convert to fraction form
    1,979.20/2,970.10 = 1,055.43/x
  3. Step 3: Cross multiply
    1,979.20x = 2,970.10 × 1,055.43
  4. Step 4: Simplify right side
    1,979.20x = 3,134,733.96
  5. Step 5: Solve for x
    x = 3,134,733.96/1,979.20
  6. Step 6: Final answer
    x = 1,583.84

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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.