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Finding the Fourth Proportional to 2,305.70, 3,455.96 and 918.67

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Solution

The fourth proportional to 2,305.70, 3,455.96 and 918.67 is: 1,376.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.70 : 3,455.96 = 918.67 : x
  2. Step 2: Convert to fraction form
    2,305.70/3,455.96 = 918.67/x
  3. Step 3: Cross multiply
    2,305.70x = 3,455.96 × 918.67
  4. Step 4: Simplify right side
    2,305.70x = 3,174,869.49
  5. Step 5: Solve for x
    x = 3,174,869.49/2,305.70
  6. Step 6: Final answer
    x = 1,376.97

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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.