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Finding the Fourth Proportional to 1,008.15, 1,391.12 and 582.75

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Solution

The fourth proportional to 1,008.15, 1,391.12 and 582.75 is: 804.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,008.15 : 1,391.12 = 582.75 : x
  2. Step 2: Convert to fraction form
    1,008.15/1,391.12 = 582.75/x
  3. Step 3: Cross multiply
    1,008.15x = 1,391.12 × 582.75
  4. Step 4: Simplify right side
    1,008.15x = 810,672.27
  5. Step 5: Solve for x
    x = 810,672.27/1,008.15
  6. Step 6: Final answer
    x = 804.12

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1.5x scale

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.