Home / 1,375.20-2,063.58-828.72

Finding the Fourth Proportional to 1,375.20, 2,063.58 and 828.72

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Solution

The fourth proportional to 1,375.20, 2,063.58 and 828.72 is: 1,243.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,375.20 : 2,063.58 = 828.72 : x
  2. Step 2: Convert to fraction form
    1,375.20/2,063.58 = 828.72/x
  3. Step 3: Cross multiply
    1,375.20x = 2,063.58 × 828.72
  4. Step 4: Simplify right side
    1,375.20x = 1,710,130.02
  5. Step 5: Solve for x
    x = 1,710,130.02/1,375.20
  6. Step 6: Final answer
    x = 1,243.55

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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.