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Finding the Fourth Proportional to 863.55, 1,190.70 and 583.20

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Solution

The fourth proportional to 863.55, 1,190.70 and 583.20 is: 804.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.55 : 1,190.70 = 583.20 : x
  2. Step 2: Convert to fraction form
    863.55/1,190.70 = 583.20/x
  3. Step 3: Cross multiply
    863.55x = 1,190.70 × 583.20
  4. Step 4: Simplify right side
    863.55x = 694,416.24
  5. Step 5: Solve for x
    x = 694,416.24/863.55
  6. Step 6: Final answer
    x = 804.14

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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.