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Finding the Fourth Proportional to 2,115.37, 3,173.06 and 654.49

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Solution

The fourth proportional to 2,115.37, 3,173.06 and 654.49 is: 981.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.37 : 3,173.06 = 654.49 : x
  2. Step 2: Convert to fraction form
    2,115.37/3,173.06 = 654.49/x
  3. Step 3: Cross multiply
    2,115.37x = 3,173.06 × 654.49
  4. Step 4: Simplify right side
    2,115.37x = 2,076,724.83
  5. Step 5: Solve for x
    x = 2,076,724.83/2,115.37
  6. Step 6: Final answer
    x = 981.73

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Double scale
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Similar ratio
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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.