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Finding the Fourth Proportional to 5,319.36, 7,980.04 and 1,621.92

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Solution

The fourth proportional to 5,319.36, 7,980.04 and 1,621.92 is: 2,433.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,319.36 : 7,980.04 = 1,621.92 : x
  2. Step 2: Convert to fraction form
    5,319.36/7,980.04 = 1,621.92/x
  3. Step 3: Cross multiply
    5,319.36x = 7,980.04 × 1,621.92
  4. Step 4: Simplify right side
    5,319.36x = 12,942,986.48
  5. Step 5: Solve for x
    x = 12,942,986.48/5,319.36
  6. Step 6: Final answer
    x = 2,433.18

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These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.