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Finding the Fourth Proportional to 827.95, 1,142.56 and 454.93

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Solution

The fourth proportional to 827.95, 1,142.56 and 454.93 is: 627.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.95 : 1,142.56 = 454.93 : x
  2. Step 2: Convert to fraction form
    827.95/1,142.56 = 454.93/x
  3. Step 3: Cross multiply
    827.95x = 1,142.56 × 454.93
  4. Step 4: Simplify right side
    827.95x = 519,784.82
  5. Step 5: Solve for x
    x = 519,784.82/827.95
  6. Step 6: Final answer
    x = 627.80

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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.