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Finding the Fourth Proportional to 3,289.70, 4,930.23 and 1,561.70

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Solution

The fourth proportional to 3,289.70, 4,930.23 and 1,561.70 is: 2,340.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,289.70 : 4,930.23 = 1,561.70 : x
  2. Step 2: Convert to fraction form
    3,289.70/4,930.23 = 1,561.70/x
  3. Step 3: Cross multiply
    3,289.70x = 4,930.23 × 1,561.70
  4. Step 4: Simplify right side
    3,289.70x = 7,699,540.19
  5. Step 5: Solve for x
    x = 7,699,540.19/3,289.70
  6. Step 6: Final answer
    x = 2,340.50

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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.