Home / 2,151.42-2,971.74-1,779.90

Finding the Fourth Proportional to 2,151.42, 2,971.74 and 1,779.90

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Solution

The fourth proportional to 2,151.42, 2,971.74 and 1,779.90 is: 2,458.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,151.42 : 2,971.74 = 1,779.90 : x
  2. Step 2: Convert to fraction form
    2,151.42/2,971.74 = 1,779.90/x
  3. Step 3: Cross multiply
    2,151.42x = 2,971.74 × 1,779.90
  4. Step 4: Simplify right side
    2,151.42x = 5,289,400.03
  5. Step 5: Solve for x
    x = 5,289,400.03/2,151.42
  6. Step 6: Final answer
    x = 2,458.56

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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.