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Finding the Fourth Proportional to 1,018.08, 1,404.24 and 935.48

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Solution

The fourth proportional to 1,018.08, 1,404.24 and 935.48 is: 1,290.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,018.08 : 1,404.24 = 935.48 : x
  2. Step 2: Convert to fraction form
    1,018.08/1,404.24 = 935.48/x
  3. Step 3: Cross multiply
    1,018.08x = 1,404.24 × 935.48
  4. Step 4: Simplify right side
    1,018.08x = 1,313,638.44
  5. Step 5: Solve for x
    x = 1,313,638.44/1,018.08
  6. Step 6: Final answer
    x = 1,290.31

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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.