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Finding the Fourth Proportional to 879.25, 1,318.93 and 294.22

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Solution

The fourth proportional to 879.25, 1,318.93 and 294.22 is: 441.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    879.25 : 1,318.93 = 294.22 : x
  2. Step 2: Convert to fraction form
    879.25/1,318.93 = 294.22/x
  3. Step 3: Cross multiply
    879.25x = 1,318.93 × 294.22
  4. Step 4: Simplify right side
    879.25x = 388,055.58
  5. Step 5: Solve for x
    x = 388,055.58/879.25
  6. Step 6: Final answer
    x = 441.35

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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.