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Finding the Fourth Proportional to 1,519.44, 2,276.88 and 653.28

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Solution

The fourth proportional to 1,519.44, 2,276.88 and 653.28 is: 978.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,519.44 : 2,276.88 = 653.28 : x
  2. Step 2: Convert to fraction form
    1,519.44/2,276.88 = 653.28/x
  3. Step 3: Cross multiply
    1,519.44x = 2,276.88 × 653.28
  4. Step 4: Simplify right side
    1,519.44x = 1,487,440.17
  5. Step 5: Solve for x
    x = 1,487,440.17/1,519.44
  6. Step 6: Final answer
    x = 978.94

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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.