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Finding the Fourth Proportional to 3,920.13, 5,880.09 and 958.57

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Solution

The fourth proportional to 3,920.13, 5,880.09 and 958.57 is: 1,437.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,920.13 : 5,880.09 = 958.57 : x
  2. Step 2: Convert to fraction form
    3,920.13/5,880.09 = 958.57/x
  3. Step 3: Cross multiply
    3,920.13x = 5,880.09 × 958.57
  4. Step 4: Simplify right side
    3,920.13x = 5,636,466.77
  5. Step 5: Solve for x
    x = 5,636,466.77/3,920.13
  6. Step 6: Final answer
    x = 1,437.83

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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.