Home / 1,980.26-2,970.51-1,157.90

Finding the Fourth Proportional to 1,980.26, 2,970.51 and 1,157.90

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Solution

The fourth proportional to 1,980.26, 2,970.51 and 1,157.90 is: 1,736.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,980.26 : 2,970.51 = 1,157.90 : x
  2. Step 2: Convert to fraction form
    1,980.26/2,970.51 = 1,157.90/x
  3. Step 3: Cross multiply
    1,980.26x = 2,970.51 × 1,157.90
  4. Step 4: Simplify right side
    1,980.26x = 3,439,553.53
  5. Step 5: Solve for x
    x = 3,439,553.53/1,980.26
  6. Step 6: Final answer
    x = 1,736.92

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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.