Home / 3,919.40-5,409.01-2,590.80

Finding the Fourth Proportional to 3,919.40, 5,409.01 and 2,590.80

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Solution

The fourth proportional to 3,919.40, 5,409.01 and 2,590.80 is: 3,575.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,919.40 : 5,409.01 = 2,590.80 : x
  2. Step 2: Convert to fraction form
    3,919.40/5,409.01 = 2,590.80/x
  3. Step 3: Cross multiply
    3,919.40x = 5,409.01 × 2,590.80
  4. Step 4: Simplify right side
    3,919.40x = 14,013,663.11
  5. Step 5: Solve for x
    x = 14,013,663.11/3,919.40
  6. Step 6: Final answer
    x = 3,575.46

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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.