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Finding the Fourth Proportional to 3,890.88, 5,368.68 and 2,319.12

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Solution

The fourth proportional to 3,890.88, 5,368.68 and 2,319.12 is: 3,199.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,890.88 : 5,368.68 = 2,319.12 : x
  2. Step 2: Convert to fraction form
    3,890.88/5,368.68 = 2,319.12/x
  3. Step 3: Cross multiply
    3,890.88x = 5,368.68 × 2,319.12
  4. Step 4: Simplify right side
    3,890.88x = 12,450,613.16
  5. Step 5: Solve for x
    x = 12,450,613.16/3,890.88
  6. Step 6: Final answer
    x = 3,199.95

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.