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Finding the Fourth Proportional to 863.04, 1,189.61 and 583.18

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Solution

The fourth proportional to 863.04, 1,189.61 and 583.18 is: 803.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    863.04 : 1,189.61 = 583.18 : x
  2. Step 2: Convert to fraction form
    863.04/1,189.61 = 583.18/x
  3. Step 3: Cross multiply
    863.04x = 1,189.61 × 583.18
  4. Step 4: Simplify right side
    863.04x = 693,753.84
  5. Step 5: Solve for x
    x = 693,753.84/863.04
  6. Step 6: Final answer
    x = 803.85

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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.