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Finding the Fourth Proportional to 827.93, 1,142.56 and 454.95

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Solution

The fourth proportional to 827.93, 1,142.56 and 454.95 is: 627.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.93 : 1,142.56 = 454.95 : x
  2. Step 2: Convert to fraction form
    827.93/1,142.56 = 454.95/x
  3. Step 3: Cross multiply
    827.93x = 1,142.56 × 454.95
  4. Step 4: Simplify right side
    827.93x = 519,806.15
  5. Step 5: Solve for x
    x = 519,806.15/827.93
  6. Step 6: Final answer
    x = 627.84

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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.