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Finding the Fourth Proportional to 845.84, 1,268.76 and 290.54

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Solution

The fourth proportional to 845.84, 1,268.76 and 290.54 is: 435.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    845.84 : 1,268.76 = 290.54 : x
  2. Step 2: Convert to fraction form
    845.84/1,268.76 = 290.54/x
  3. Step 3: Cross multiply
    845.84x = 1,268.76 × 290.54
  4. Step 4: Simplify right side
    845.84x = 368,625.53
  5. Step 5: Solve for x
    x = 368,625.53/845.84
  6. Step 6: Final answer
    x = 435.81

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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.