Home / 1,515.21-2,272.81-475.22

Finding the Fourth Proportional to 1,515.21, 2,272.81 and 475.22

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Solution

The fourth proportional to 1,515.21, 2,272.81 and 475.22 is: 712.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.21 : 2,272.81 = 475.22 : x
  2. Step 2: Convert to fraction form
    1,515.21/2,272.81 = 475.22/x
  3. Step 3: Cross multiply
    1,515.21x = 2,272.81 × 475.22
  4. Step 4: Simplify right side
    1,515.21x = 1,080,084.77
  5. Step 5: Solve for x
    x = 1,080,084.77/1,515.21
  6. Step 6: Final answer
    x = 712.83

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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.