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Finding the Fourth Proportional to 1,779.80, 2,669.70 and 1,609.70

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Solution

The fourth proportional to 1,779.80, 2,669.70 and 1,609.70 is: 2,414.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,779.80 : 2,669.70 = 1,609.70 : x
  2. Step 2: Convert to fraction form
    1,779.80/2,669.70 = 1,609.70/x
  3. Step 3: Cross multiply
    1,779.80x = 2,669.70 × 1,609.70
  4. Step 4: Simplify right side
    1,779.80x = 4,297,416.09
  5. Step 5: Solve for x
    x = 4,297,416.09/1,779.80
  6. Step 6: Final answer
    x = 2,414.55

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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.