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Finding the Fourth Proportional to 2,305.62, 3,458.78 and 918.96

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Solution

The fourth proportional to 2,305.62, 3,458.78 and 918.96 is: 1,378.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,305.62 : 3,458.78 = 918.96 : x
  2. Step 2: Convert to fraction form
    2,305.62/3,458.78 = 918.96/x
  3. Step 3: Cross multiply
    2,305.62x = 3,458.78 × 918.96
  4. Step 4: Simplify right side
    2,305.62x = 3,178,475.87
  5. Step 5: Solve for x
    x = 3,178,475.87/2,305.62
  6. Step 6: Final answer
    x = 1,378.58

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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.