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Finding the Fourth Proportional to 3,779.40, 5,657.90 and 2,809.80

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Solution

The fourth proportional to 3,779.40, 5,657.90 and 2,809.80 is: 4,206.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,779.40 : 5,657.90 = 2,809.80 : x
  2. Step 2: Convert to fraction form
    3,779.40/5,657.90 = 2,809.80/x
  3. Step 3: Cross multiply
    3,779.40x = 5,657.90 × 2,809.80
  4. Step 4: Simplify right side
    3,779.40x = 15,897,567.42
  5. Step 5: Solve for x
    x = 15,897,567.42/3,779.40
  6. Step 6: Final answer
    x = 4,206.37

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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.