Home / 2,156.26-2,980.38-1,570.90

Finding the Fourth Proportional to 2,156.26, 2,980.38 and 1,570.90

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Solution

The fourth proportional to 2,156.26, 2,980.38 and 1,570.90 is: 2,171.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,156.26 : 2,980.38 = 1,570.90 : x
  2. Step 2: Convert to fraction form
    2,156.26/2,980.38 = 1,570.90/x
  3. Step 3: Cross multiply
    2,156.26x = 2,980.38 × 1,570.90
  4. Step 4: Simplify right side
    2,156.26x = 4,681,878.94
  5. Step 5: Solve for x
    x = 4,681,878.94/2,156.26
  6. Step 6: Final answer
    x = 2,171.30

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.