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Finding the Fourth Proportional to 2,174.65, 3,260.86 and 787.62

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Solution

The fourth proportional to 2,174.65, 3,260.86 and 787.62 is: 1,181.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,174.65 : 3,260.86 = 787.62 : x
  2. Step 2: Convert to fraction form
    2,174.65/3,260.86 = 787.62/x
  3. Step 3: Cross multiply
    2,174.65x = 3,260.86 × 787.62
  4. Step 4: Simplify right side
    2,174.65x = 2,568,328.81
  5. Step 5: Solve for x
    x = 2,568,328.81/2,174.65
  6. Step 6: Final answer
    x = 1,181.03

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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.