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Finding the Fourth Proportional to 3,174.75, 4,762.80 and 983.70

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Solution

The fourth proportional to 3,174.75, 4,762.80 and 983.70 is: 1,475.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,174.75 : 4,762.80 = 983.70 : x
  2. Step 2: Convert to fraction form
    3,174.75/4,762.80 = 983.70/x
  3. Step 3: Cross multiply
    3,174.75x = 4,762.80 × 983.70
  4. Step 4: Simplify right side
    3,174.75x = 4,685,166.36
  5. Step 5: Solve for x
    x = 4,685,166.36/3,174.75
  6. Step 6: Final answer
    x = 1,475.76

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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.