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Finding the Fourth Proportional to 2,187.81, 3,279.47 and 954.99

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Solution

The fourth proportional to 2,187.81, 3,279.47 and 954.99 is: 1,431.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.81 : 3,279.47 = 954.99 : x
  2. Step 2: Convert to fraction form
    2,187.81/3,279.47 = 954.99/x
  3. Step 3: Cross multiply
    2,187.81x = 3,279.47 × 954.99
  4. Step 4: Simplify right side
    2,187.81x = 3,131,856.28
  5. Step 5: Solve for x
    x = 3,131,856.28/2,187.81
  6. Step 6: Final answer
    x = 1,431.50

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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.