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Finding the Fourth Proportional to 1,491.16, 2,057.73 and 828.01

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Solution

The fourth proportional to 1,491.16, 2,057.73 and 828.01 is: 1,142.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,491.16 : 2,057.73 = 828.01 : x
  2. Step 2: Convert to fraction form
    1,491.16/2,057.73 = 828.01/x
  3. Step 3: Cross multiply
    1,491.16x = 2,057.73 × 828.01
  4. Step 4: Simplify right side
    1,491.16x = 1,703,821.02
  5. Step 5: Solve for x
    x = 1,703,821.02/1,491.16
  6. Step 6: Final answer
    x = 1,142.61

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.