Home / 3,779.86-5,215.08-2,991.46

Finding the Fourth Proportional to 3,779.86, 5,215.08 and 2,991.46

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Solution

The fourth proportional to 3,779.86, 5,215.08 and 2,991.46 is: 4,127.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.86 : 5,215.08 = 2,991.46 : x
  2. Step 2: Convert to fraction form
    3,779.86/5,215.08 = 2,991.46/x
  3. Step 3: Cross multiply
    3,779.86x = 5,215.08 × 2,991.46
  4. Step 4: Simplify right side
    3,779.86x = 15,600,703.22
  5. Step 5: Solve for x
    x = 15,600,703.22/3,779.86
  6. Step 6: Final answer
    x = 4,127.32

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1.5x scale

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.