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Finding the Fourth Proportional to 1,665.28, 2,497.92 and 511.12

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Solution

The fourth proportional to 1,665.28, 2,497.92 and 511.12 is: 766.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,665.28 : 2,497.92 = 511.12 : x
  2. Step 2: Convert to fraction form
    1,665.28/2,497.92 = 511.12/x
  3. Step 3: Cross multiply
    1,665.28x = 2,497.92 × 511.12
  4. Step 4: Simplify right side
    1,665.28x = 1,276,736.87
  5. Step 5: Solve for x
    x = 1,276,736.87/1,665.28
  6. Step 6: Final answer
    x = 766.68

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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.