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Finding the Fourth Proportional to 2,880.72, 4,321.08 and 828.72

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Solution

The fourth proportional to 2,880.72, 4,321.08 and 828.72 is: 1,243.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.72 : 4,321.08 = 828.72 : x
  2. Step 2: Convert to fraction form
    2,880.72/4,321.08 = 828.72/x
  3. Step 3: Cross multiply
    2,880.72x = 4,321.08 × 828.72
  4. Step 4: Simplify right side
    2,880.72x = 3,580,965.42
  5. Step 5: Solve for x
    x = 3,580,965.42/2,880.72
  6. Step 6: Final answer
    x = 1,243.08

Related Problems

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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.