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Finding the Fourth Proportional to 3,617.85, 5,421.54 and 1,766.88

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Solution

The fourth proportional to 3,617.85, 5,421.54 and 1,766.88 is: 2,647.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,617.85 : 5,421.54 = 1,766.88 : x
  2. Step 2: Convert to fraction form
    3,617.85/5,421.54 = 1,766.88/x
  3. Step 3: Cross multiply
    3,617.85x = 5,421.54 × 1,766.88
  4. Step 4: Simplify right side
    3,617.85x = 9,579,210.60
  5. Step 5: Solve for x
    x = 9,579,210.60/3,617.85
  6. Step 6: Final answer
    x = 2,647.76

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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.