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Finding the Fourth Proportional to 3,576.79, 5,364.36 and 979.93

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Solution

The fourth proportional to 3,576.79, 5,364.36 and 979.93 is: 1,469.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,576.79 : 5,364.36 = 979.93 : x
  2. Step 2: Convert to fraction form
    3,576.79/5,364.36 = 979.93/x
  3. Step 3: Cross multiply
    3,576.79x = 5,364.36 × 979.93
  4. Step 4: Simplify right side
    3,576.79x = 5,256,668.02
  5. Step 5: Solve for x
    x = 5,256,668.02/3,576.79
  6. Step 6: Final answer
    x = 1,469.66

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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.