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Finding the Fourth Proportional to 935.82, 1,403.60 and 380.43

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Solution

The fourth proportional to 935.82, 1,403.60 and 380.43 is: 570.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.82 : 1,403.60 = 380.43 : x
  2. Step 2: Convert to fraction form
    935.82/1,403.60 = 380.43/x
  3. Step 3: Cross multiply
    935.82x = 1,403.60 × 380.43
  4. Step 4: Simplify right side
    935.82x = 533,969.65
  5. Step 5: Solve for x
    x = 533,969.65/935.82
  6. Step 6: Final answer
    x = 570.59

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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.