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Finding the Fourth Proportional to 2,309.14, 3,461.34 and 920.60

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Solution

The fourth proportional to 2,309.14, 3,461.34 and 920.60 is: 1,379.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,309.14 : 3,461.34 = 920.60 : x
  2. Step 2: Convert to fraction form
    2,309.14/3,461.34 = 920.60/x
  3. Step 3: Cross multiply
    2,309.14x = 3,461.34 × 920.60
  4. Step 4: Simplify right side
    2,309.14x = 3,186,509.60
  5. Step 5: Solve for x
    x = 3,186,509.60/2,309.14
  6. Step 6: Final answer
    x = 1,379.96

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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.