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Finding the Fourth Proportional to 820.46, 1,131.98 and 584.45

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Solution

The fourth proportional to 820.46, 1,131.98 and 584.45 is: 806.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    820.46 : 1,131.98 = 584.45 : x
  2. Step 2: Convert to fraction form
    820.46/1,131.98 = 584.45/x
  3. Step 3: Cross multiply
    820.46x = 1,131.98 × 584.45
  4. Step 4: Simplify right side
    820.46x = 661,581.37
  5. Step 5: Solve for x
    x = 661,581.37/820.46
  6. Step 6: Final answer
    x = 806.35

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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.