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Finding the Fourth Proportional to 2,880.64, 3,976 and 1,776

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Solution

The fourth proportional to 2,880.64, 3,976 and 1,776 is: 2,451.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,880.64 : 3,976 = 1,776 : x
  2. Step 2: Convert to fraction form
    2,880.64/3,976 = 1,776/x
  3. Step 3: Cross multiply
    2,880.64x = 3,976 × 1,776
  4. Step 4: Simplify right side
    2,880.64x = 7,061,376
  5. Step 5: Solve for x
    x = 7,061,376/2,880.64
  6. Step 6: Final answer
    x = 2,451.32

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Why These Related Problems?

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