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Finding the Fourth Proportional to 930.07, 1,393.26 and 636.85

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Solution

The fourth proportional to 930.07, 1,393.26 and 636.85 is: 954.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    930.07 : 1,393.26 = 636.85 : x
  2. Step 2: Convert to fraction form
    930.07/1,393.26 = 636.85/x
  3. Step 3: Cross multiply
    930.07x = 1,393.26 × 636.85
  4. Step 4: Simplify right side
    930.07x = 887,297.63
  5. Step 5: Solve for x
    x = 887,297.63/930.07
  6. Step 6: Final answer
    x = 954.01

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.