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Finding the Fourth Proportional to 3,615.05, 5,422.58 and 1,422.58

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Solution

The fourth proportional to 3,615.05, 5,422.58 and 1,422.58 is: 2,133.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.05 : 5,422.58 = 1,422.58 : x
  2. Step 2: Convert to fraction form
    3,615.05/5,422.58 = 1,422.58/x
  3. Step 3: Cross multiply
    3,615.05x = 5,422.58 × 1,422.58
  4. Step 4: Simplify right side
    3,615.05x = 7,714,053.86
  5. Step 5: Solve for x
    x = 7,714,053.86/3,615.05
  6. Step 6: Final answer
    x = 2,133.87

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Similar ratio
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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.