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Finding the Fourth Proportional to 935.62, 1,403.39 and 380.57

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Solution

The fourth proportional to 935.62, 1,403.39 and 380.57 is: 570.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    935.62 : 1,403.39 = 380.57 : x
  2. Step 2: Convert to fraction form
    935.62/1,403.39 = 380.57/x
  3. Step 3: Cross multiply
    935.62x = 1,403.39 × 380.57
  4. Step 4: Simplify right side
    935.62x = 534,082.07
  5. Step 5: Solve for x
    x = 534,082.07/935.62
  6. Step 6: Final answer
    x = 570.83

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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.