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Finding the Fourth Proportional to 831.15, 1,147.04 and 582.56

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Solution

The fourth proportional to 831.15, 1,147.04 and 582.56 is: 803.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    831.15 : 1,147.04 = 582.56 : x
  2. Step 2: Convert to fraction form
    831.15/1,147.04 = 582.56/x
  3. Step 3: Cross multiply
    831.15x = 1,147.04 × 582.56
  4. Step 4: Simplify right side
    831.15x = 668,210.97
  5. Step 5: Solve for x
    x = 668,210.97/831.15
  6. Step 6: Final answer
    x = 803.96

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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.