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Finding the Fourth Proportional to 706.36, 974.62 and 485.23

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Solution

The fourth proportional to 706.36, 974.62 and 485.23 is: 669.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    706.36 : 974.62 = 485.23 : x
  2. Step 2: Convert to fraction form
    706.36/974.62 = 485.23/x
  3. Step 3: Cross multiply
    706.36x = 974.62 × 485.23
  4. Step 4: Simplify right side
    706.36x = 472,914.86
  5. Step 5: Solve for x
    x = 472,914.86/706.36
  6. Step 6: Final answer
    x = 669.51

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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.