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Finding the Fourth Proportional to 935.33, 1,290.98 and 620.44

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Solution

The fourth proportional to 935.33, 1,290.98 and 620.44 is: 856.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.33 : 1,290.98 = 620.44 : x
  2. Step 2: Convert to fraction form
    935.33/1,290.98 = 620.44/x
  3. Step 3: Cross multiply
    935.33x = 1,290.98 × 620.44
  4. Step 4: Simplify right side
    935.33x = 800,973.95
  5. Step 5: Solve for x
    x = 800,973.95/935.33
  6. Step 6: Final answer
    x = 856.36

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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.