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Finding the Fourth Proportional to 693.09, 955.80 and 611.01

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Solution

The fourth proportional to 693.09, 955.80 and 611.01 is: 842.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.09 : 955.80 = 611.01 : x
  2. Step 2: Convert to fraction form
    693.09/955.80 = 611.01/x
  3. Step 3: Cross multiply
    693.09x = 955.80 × 611.01
  4. Step 4: Simplify right side
    693.09x = 584,003.36
  5. Step 5: Solve for x
    x = 584,003.36/693.09
  6. Step 6: Final answer
    x = 842.61

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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.