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Finding the Fourth Proportional to 3,172.37, 4,758.55 and 981.11

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Solution

The fourth proportional to 3,172.37, 4,758.55 and 981.11 is: 1,471.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,172.37 : 4,758.55 = 981.11 : x
  2. Step 2: Convert to fraction form
    3,172.37/4,758.55 = 981.11/x
  3. Step 3: Cross multiply
    3,172.37x = 4,758.55 × 981.11
  4. Step 4: Simplify right side
    3,172.37x = 4,668,670.43
  5. Step 5: Solve for x
    x = 4,668,670.43/3,172.37
  6. Step 6: Final answer
    x = 1,471.67

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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.