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Finding the Fourth Proportional to 3,576.56, 5,364.24 and 978.96

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Solution

The fourth proportional to 3,576.56, 5,364.24 and 978.96 is: 1,468.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,576.56 : 5,364.24 = 978.96 : x
  2. Step 2: Convert to fraction form
    3,576.56/5,364.24 = 978.96/x
  3. Step 3: Cross multiply
    3,576.56x = 5,364.24 × 978.96
  4. Step 4: Simplify right side
    3,576.56x = 5,251,376.39
  5. Step 5: Solve for x
    x = 5,251,376.39/3,576.56
  6. Step 6: Final answer
    x = 1,468.28

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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.