Home / 1,979.40-2,969.96-1,157.68

Finding the Fourth Proportional to 1,979.40, 2,969.96 and 1,157.68

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Solution

The fourth proportional to 1,979.40, 2,969.96 and 1,157.68 is: 1,737.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,979.40 : 2,969.96 = 1,157.68 : x
  2. Step 2: Convert to fraction form
    1,979.40/2,969.96 = 1,157.68/x
  3. Step 3: Cross multiply
    1,979.40x = 2,969.96 × 1,157.68
  4. Step 4: Simplify right side
    1,979.40x = 3,438,263.29
  5. Step 5: Solve for x
    x = 3,438,263.29/1,979.40
  6. Step 6: Final answer
    x = 1,737.02

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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.