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Finding the Fourth Proportional to 880.97, 1,321.43 and 518.06

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Solution

The fourth proportional to 880.97, 1,321.43 and 518.06 is: 777.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    880.97 : 1,321.43 = 518.06 : x
  2. Step 2: Convert to fraction form
    880.97/1,321.43 = 518.06/x
  3. Step 3: Cross multiply
    880.97x = 1,321.43 × 518.06
  4. Step 4: Simplify right side
    880.97x = 684,570.83
  5. Step 5: Solve for x
    x = 684,570.83/880.97
  6. Step 6: Final answer
    x = 777.07

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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.