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Finding the Fourth Proportional to 4,607.99, 6,911.98 and 1,321.11

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Solution

The fourth proportional to 4,607.99, 6,911.98 and 1,321.11 is: 1,981.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,607.99 : 6,911.98 = 1,321.11 : x
  2. Step 2: Convert to fraction form
    4,607.99/6,911.98 = 1,321.11/x
  3. Step 3: Cross multiply
    4,607.99x = 6,911.98 × 1,321.11
  4. Step 4: Simplify right side
    4,607.99x = 9,131,490.03
  5. Step 5: Solve for x
    x = 9,131,490.03/4,607.99
  6. Step 6: Final answer
    x = 1,981.67

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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.