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Finding the Fourth Proportional to 3,174.78, 4,762.23 and 866.28

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Solution

The fourth proportional to 3,174.78, 4,762.23 and 866.28 is: 1,299.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.78 : 4,762.23 = 866.28 : x
  2. Step 2: Convert to fraction form
    3,174.78/4,762.23 = 866.28/x
  3. Step 3: Cross multiply
    3,174.78x = 4,762.23 × 866.28
  4. Step 4: Simplify right side
    3,174.78x = 4,125,424.60
  5. Step 5: Solve for x
    x = 4,125,424.60/3,174.78
  6. Step 6: Final answer
    x = 1,299.44

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1.5x scale

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.