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Finding the Fourth Proportional to 2,621.03, 3,931.55 and 889.67

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Solution

The fourth proportional to 2,621.03, 3,931.55 and 889.67 is: 1,334.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,621.03 : 3,931.55 = 889.67 : x
  2. Step 2: Convert to fraction form
    2,621.03/3,931.55 = 889.67/x
  3. Step 3: Cross multiply
    2,621.03x = 3,931.55 × 889.67
  4. Step 4: Simplify right side
    2,621.03x = 3,497,757.98
  5. Step 5: Solve for x
    x = 3,497,757.98/2,621.03
  6. Step 6: Final answer
    x = 1,334.50

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Half scale
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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.