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Finding the Fourth Proportional to 935.14, 1,291.04 and 620.83

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Solution

The fourth proportional to 935.14, 1,291.04 and 620.83 is: 857.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.14 : 1,291.04 = 620.83 : x
  2. Step 2: Convert to fraction form
    935.14/1,291.04 = 620.83/x
  3. Step 3: Cross multiply
    935.14x = 1,291.04 × 620.83
  4. Step 4: Simplify right side
    935.14x = 801,516.36
  5. Step 5: Solve for x
    x = 801,516.36/935.14
  6. Step 6: Final answer
    x = 857.11

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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.