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Finding the Fourth Proportional to 961.11, 1,442.07 and 384.39

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Solution

The fourth proportional to 961.11, 1,442.07 and 384.39 is: 576.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    961.11 : 1,442.07 = 384.39 : x
  2. Step 2: Convert to fraction form
    961.11/1,442.07 = 384.39/x
  3. Step 3: Cross multiply
    961.11x = 1,442.07 × 384.39
  4. Step 4: Simplify right side
    961.11x = 554,317.29
  5. Step 5: Solve for x
    x = 554,317.29/961.11
  6. Step 6: Final answer
    x = 576.75

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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.