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Finding the Fourth Proportional to 1,903.60, 2,853.73 and 978.68

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Solution

The fourth proportional to 1,903.60, 2,853.73 and 978.68 is: 1,467.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,903.60 : 2,853.73 = 978.68 : x
  2. Step 2: Convert to fraction form
    1,903.60/2,853.73 = 978.68/x
  3. Step 3: Cross multiply
    1,903.60x = 2,853.73 × 978.68
  4. Step 4: Simplify right side
    1,903.60x = 2,792,896.83
  5. Step 5: Solve for x
    x = 2,792,896.83/1,903.60
  6. Step 6: Final answer
    x = 1,467.16

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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.