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Finding the Fourth Proportional to 2,880, 4,321.92 and 1,582.56

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Solution

The fourth proportional to 2,880, 4,321.92 and 1,582.56 is: 2,374.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880 : 4,321.92 = 1,582.56 : x
  2. Step 2: Convert to fraction form
    2,880/4,321.92 = 1,582.56/x
  3. Step 3: Cross multiply
    2,880x = 4,321.92 × 1,582.56
  4. Step 4: Simplify right side
    2,880x = 6,839,697.72
  5. Step 5: Solve for x
    x = 6,839,697.72/2,880
  6. Step 6: Final answer
    x = 2,374.90

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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.