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Finding the Fourth Proportional to 3,609.21, 4,980.71 and 1,953.21

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Solution

The fourth proportional to 3,609.21, 4,980.71 and 1,953.21 is: 2,695.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,609.21 : 4,980.71 = 1,953.21 : x
  2. Step 2: Convert to fraction form
    3,609.21/4,980.71 = 1,953.21/x
  3. Step 3: Cross multiply
    3,609.21x = 4,980.71 × 1,953.21
  4. Step 4: Simplify right side
    3,609.21x = 9,728,372.58
  5. Step 5: Solve for x
    x = 9,728,372.58/3,609.21
  6. Step 6: Final answer
    x = 2,695.43

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Half scale
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Double scale
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Similar ratio
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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.