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Finding the Fourth Proportional to 5,739.26, 8,609.65 and 1,790.78

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Solution

The fourth proportional to 5,739.26, 8,609.65 and 1,790.78 is: 2,686.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,739.26 : 8,609.65 = 1,790.78 : x
  2. Step 2: Convert to fraction form
    5,739.26/8,609.65 = 1,790.78/x
  3. Step 3: Cross multiply
    5,739.26x = 8,609.65 × 1,790.78
  4. Step 4: Simplify right side
    5,739.26x = 15,417,941.50
  5. Step 5: Solve for x
    x = 15,417,941.50/5,739.26
  6. Step 6: Final answer
    x = 2,686.40

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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.