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Finding the Fourth Proportional to 1,078.37, 1,613.91 and 1,054.07

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Solution

The fourth proportional to 1,078.37, 1,613.91 and 1,054.07 is: 1,577.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.37 : 1,613.91 = 1,054.07 : x
  2. Step 2: Convert to fraction form
    1,078.37/1,613.91 = 1,054.07/x
  3. Step 3: Cross multiply
    1,078.37x = 1,613.91 × 1,054.07
  4. Step 4: Simplify right side
    1,078.37x = 1,701,174.11
  5. Step 5: Solve for x
    x = 1,701,174.11/1,078.37
  6. Step 6: Final answer
    x = 1,577.54

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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.