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Finding the Fourth Proportional to 1,660.43, 2,490.63 and 792.11

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Solution

The fourth proportional to 1,660.43, 2,490.63 and 792.11 is: 1,188.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,660.43 : 2,490.63 = 792.11 : x
  2. Step 2: Convert to fraction form
    1,660.43/2,490.63 = 792.11/x
  3. Step 3: Cross multiply
    1,660.43x = 2,490.63 × 792.11
  4. Step 4: Simplify right side
    1,660.43x = 1,972,852.93
  5. Step 5: Solve for x
    x = 1,972,852.93/1,660.43
  6. Step 6: Final answer
    x = 1,188.16

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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.