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Finding the Fourth Proportional to 935.25, 1,289.37 and 699.54

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Solution

The fourth proportional to 935.25, 1,289.37 and 699.54 is: 964.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.25 : 1,289.37 = 699.54 : x
  2. Step 2: Convert to fraction form
    935.25/1,289.37 = 699.54/x
  3. Step 3: Cross multiply
    935.25x = 1,289.37 × 699.54
  4. Step 4: Simplify right side
    935.25x = 901,959.74
  5. Step 5: Solve for x
    x = 901,959.74/935.25
  6. Step 6: Final answer
    x = 964.41

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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.