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Finding the Fourth Proportional to 606.90, 831.06 and 606.90

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Solution

The fourth proportional to 606.90, 831.06 and 606.90 is: 831.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    606.90 : 831.06 = 606.90 : x
  2. Step 2: Convert to fraction form
    606.90/831.06 = 606.90/x
  3. Step 3: Cross multiply
    606.90x = 831.06 × 606.90
  4. Step 4: Simplify right side
    606.90x = 504,370.31
  5. Step 5: Solve for x
    x = 504,370.31/606.90
  6. Step 6: Final answer
    x = 831.06

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Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.