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Finding the Fourth Proportional to 893.11, 1,339.66 and 380.11

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Solution

The fourth proportional to 893.11, 1,339.66 and 380.11 is: 570.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    893.11 : 1,339.66 = 380.11 : x
  2. Step 2: Convert to fraction form
    893.11/1,339.66 = 380.11/x
  3. Step 3: Cross multiply
    893.11x = 1,339.66 × 380.11
  4. Step 4: Simplify right side
    893.11x = 509,218.87
  5. Step 5: Solve for x
    x = 509,218.87/893.11
  6. Step 6: Final answer
    x = 570.16

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Double scale
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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.