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Finding the Fourth Proportional to 862.54, 1,189.86 and 582.42

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Solution

The fourth proportional to 862.54, 1,189.86 and 582.42 is: 803.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    862.54 : 1,189.86 = 582.42 : x
  2. Step 2: Convert to fraction form
    862.54/1,189.86 = 582.42/x
  3. Step 3: Cross multiply
    862.54x = 1,189.86 × 582.42
  4. Step 4: Simplify right side
    862.54x = 692,998.26
  5. Step 5: Solve for x
    x = 692,998.26/862.54
  6. Step 6: Final answer
    x = 803.44

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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.