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Finding the Fourth Proportional to 3,090.76, 4,626.11 and 1,980.86

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Solution

The fourth proportional to 3,090.76, 4,626.11 and 1,980.86 is: 2,964.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,090.76 : 4,626.11 = 1,980.86 : x
  2. Step 2: Convert to fraction form
    3,090.76/4,626.11 = 1,980.86/x
  3. Step 3: Cross multiply
    3,090.76x = 4,626.11 × 1,980.86
  4. Step 4: Simplify right side
    3,090.76x = 9,163,658.08
  5. Step 5: Solve for x
    x = 9,163,658.08/3,090.76
  6. Step 6: Final answer
    x = 2,964.86

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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.