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Finding the Fourth Proportional to 2,185.65, 3,278.46 and 625.70

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Solution

The fourth proportional to 2,185.65, 3,278.46 and 625.70 is: 938.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,185.65 : 3,278.46 = 625.70 : x
  2. Step 2: Convert to fraction form
    2,185.65/3,278.46 = 625.70/x
  3. Step 3: Cross multiply
    2,185.65x = 3,278.46 × 625.70
  4. Step 4: Simplify right side
    2,185.65x = 2,051,318.38
  5. Step 5: Solve for x
    x = 2,051,318.38/2,185.65
  6. Step 6: Final answer
    x = 938.54

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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.