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Finding the Fourth Proportional to 2,560.14, 3,840.93 and 828.90

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Solution

The fourth proportional to 2,560.14, 3,840.93 and 828.90 is: 1,243.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,560.14 : 3,840.93 = 828.90 : x
  2. Step 2: Convert to fraction form
    2,560.14/3,840.93 = 828.90/x
  3. Step 3: Cross multiply
    2,560.14x = 3,840.93 × 828.90
  4. Step 4: Simplify right side
    2,560.14x = 3,183,746.88
  5. Step 5: Solve for x
    x = 3,183,746.88/2,560.14
  6. Step 6: Final answer
    x = 1,243.58

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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.