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Finding the Fourth Proportional to 2,277.46, 3,415.56 and 978.64

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Solution

The fourth proportional to 2,277.46, 3,415.56 and 978.64 is: 1,467.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,277.46 : 3,415.56 = 978.64 : x
  2. Step 2: Convert to fraction form
    2,277.46/3,415.56 = 978.64/x
  3. Step 3: Cross multiply
    2,277.46x = 3,415.56 × 978.64
  4. Step 4: Simplify right side
    2,277.46x = 3,342,603.64
  5. Step 5: Solve for x
    x = 3,342,603.64/2,277.46
  6. Step 6: Final answer
    x = 1,467.69

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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.