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Finding the Fourth Proportional to 779.09, 1,168.49 and 292.05

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Solution

The fourth proportional to 779.09, 1,168.49 and 292.05 is: 438.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    779.09 : 1,168.49 = 292.05 : x
  2. Step 2: Convert to fraction form
    779.09/1,168.49 = 292.05/x
  3. Step 3: Cross multiply
    779.09x = 1,168.49 × 292.05
  4. Step 4: Simplify right side
    779.09x = 341,258.23
  5. Step 5: Solve for x
    x = 341,258.23/779.09
  6. Step 6: Final answer
    x = 438.02

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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.