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Finding the Fourth Proportional to 1,418.53, 1,957.59 and 828.95

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Solution

The fourth proportional to 1,418.53, 1,957.59 and 828.95 is: 1,143.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,418.53 : 1,957.59 = 828.95 : x
  2. Step 2: Convert to fraction form
    1,418.53/1,957.59 = 828.95/x
  3. Step 3: Cross multiply
    1,418.53x = 1,957.59 × 828.95
  4. Step 4: Simplify right side
    1,418.53x = 1,622,749.12
  5. Step 5: Solve for x
    x = 1,622,749.12/1,418.53
  6. Step 6: Final answer
    x = 1,143.96

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.