Home / 3,421.35-5,135.28-1,779.09

Finding the Fourth Proportional to 3,421.35, 5,135.28 and 1,779.09

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Solution

The fourth proportional to 3,421.35, 5,135.28 and 1,779.09 is: 2,670.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,421.35 : 5,135.28 = 1,779.09 : x
  2. Step 2: Convert to fraction form
    3,421.35/5,135.28 = 1,779.09/x
  3. Step 3: Cross multiply
    3,421.35x = 5,135.28 × 1,779.09
  4. Step 4: Simplify right side
    3,421.35x = 9,136,125.30
  5. Step 5: Solve for x
    x = 9,136,125.30/3,421.35
  6. Step 6: Final answer
    x = 2,670.33

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1.5x scale

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.