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Finding the Fourth Proportional to 1,504.78, 2,256.99 and 638.44

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Solution

The fourth proportional to 1,504.78, 2,256.99 and 638.44 is: 957.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,504.78 : 2,256.99 = 638.44 : x
  2. Step 2: Convert to fraction form
    1,504.78/2,256.99 = 638.44/x
  3. Step 3: Cross multiply
    1,504.78x = 2,256.99 × 638.44
  4. Step 4: Simplify right side
    1,504.78x = 1,440,952.70
  5. Step 5: Solve for x
    x = 1,440,952.70/1,504.78
  6. Step 6: Final answer
    x = 957.58

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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.