Home / 1,980.20-2,971.60-1,056.43

Finding the Fourth Proportional to 1,980.20, 2,971.60 and 1,056.43

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Solution

The fourth proportional to 1,980.20, 2,971.60 and 1,056.43 is: 1,585.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.20 : 2,971.60 = 1,056.43 : x
  2. Step 2: Convert to fraction form
    1,980.20/2,971.60 = 1,056.43/x
  3. Step 3: Cross multiply
    1,980.20x = 2,971.60 × 1,056.43
  4. Step 4: Simplify right side
    1,980.20x = 3,139,287.39
  5. Step 5: Solve for x
    x = 3,139,287.39/1,980.20
  6. Step 6: Final answer
    x = 1,585.34

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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.