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Finding the Fourth Proportional to 3,620.81, 4,996.73 and 1,964.81

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Solution

The fourth proportional to 3,620.81, 4,996.73 and 1,964.81 is: 2,711.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,620.81 : 4,996.73 = 1,964.81 : x
  2. Step 2: Convert to fraction form
    3,620.81/4,996.73 = 1,964.81/x
  3. Step 3: Cross multiply
    3,620.81x = 4,996.73 × 1,964.81
  4. Step 4: Simplify right side
    3,620.81x = 9,817,642.48
  5. Step 5: Solve for x
    x = 9,817,642.48/3,620.81
  6. Step 6: Final answer
    x = 2,711.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.