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Finding the Fourth Proportional to 1,078.09, 1,617.14 and 384.73

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Solution

The fourth proportional to 1,078.09, 1,617.14 and 384.73 is: 577.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,078.09 : 1,617.14 = 384.73 : x
  2. Step 2: Convert to fraction form
    1,078.09/1,617.14 = 384.73/x
  3. Step 3: Cross multiply
    1,078.09x = 1,617.14 × 384.73
  4. Step 4: Simplify right side
    1,078.09x = 622,162.27
  5. Step 5: Solve for x
    x = 622,162.27/1,078.09
  6. Step 6: Final answer
    x = 577.10

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Double scale
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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.