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Finding the Fourth Proportional to 1,708.36, 2,560.52 and 978.44

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Solution

The fourth proportional to 1,708.36, 2,560.52 and 978.44 is: 1,466.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,708.36 : 2,560.52 = 978.44 : x
  2. Step 2: Convert to fraction form
    1,708.36/2,560.52 = 978.44/x
  3. Step 3: Cross multiply
    1,708.36x = 2,560.52 × 978.44
  4. Step 4: Simplify right side
    1,708.36x = 2,505,315.19
  5. Step 5: Solve for x
    x = 2,505,315.19/1,708.36
  6. Step 6: Final answer
    x = 1,466.50

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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.