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Finding the Fourth Proportional to 4,057.64, 6,087.10 and 1,321

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Solution

The fourth proportional to 4,057.64, 6,087.10 and 1,321 is: 1,981.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,057.64 : 6,087.10 = 1,321 : x
  2. Step 2: Convert to fraction form
    4,057.64/6,087.10 = 1,321/x
  3. Step 3: Cross multiply
    4,057.64x = 6,087.10 × 1,321
  4. Step 4: Simplify right side
    4,057.64x = 8,041,059.10
  5. Step 5: Solve for x
    x = 8,041,059.10/4,057.64
  6. Step 6: Final answer
    x = 1,981.71

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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.