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Finding the Fourth Proportional to 2,186.94, 3,280.41 and 648.06

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Solution

The fourth proportional to 2,186.94, 3,280.41 and 648.06 is: 972.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,186.94 : 3,280.41 = 648.06 : x
  2. Step 2: Convert to fraction form
    2,186.94/3,280.41 = 648.06/x
  3. Step 3: Cross multiply
    2,186.94x = 3,280.41 × 648.06
  4. Step 4: Simplify right side
    2,186.94x = 2,125,902.50
  5. Step 5: Solve for x
    x = 2,125,902.50/2,186.94
  6. Step 6: Final answer
    x = 972.09

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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.