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Finding the Fourth Proportional to 827.04, 1,140 and 771.92

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Solution

The fourth proportional to 827.04, 1,140 and 771.92 is: 1,064.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    827.04 : 1,140 = 771.92 : x
  2. Step 2: Convert to fraction form
    827.04/1,140 = 771.92/x
  3. Step 3: Cross multiply
    827.04x = 1,140 × 771.92
  4. Step 4: Simplify right side
    827.04x = 879,988.80
  5. Step 5: Solve for x
    x = 879,988.80/827.04
  6. Step 6: Final answer
    x = 1,064.02

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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.