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Finding the Fourth Proportional to 2,471.65, 3,707.43 and 828.07

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Solution

The fourth proportional to 2,471.65, 3,707.43 and 828.07 is: 1,242.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,471.65 : 3,707.43 = 828.07 : x
  2. Step 2: Convert to fraction form
    2,471.65/3,707.43 = 828.07/x
  3. Step 3: Cross multiply
    2,471.65x = 3,707.43 × 828.07
  4. Step 4: Simplify right side
    2,471.65x = 3,070,011.56
  5. Step 5: Solve for x
    x = 3,070,011.56/2,471.65
  6. Step 6: Final answer
    x = 1,242.09

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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.