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Finding the Fourth Proportional to 2,643.34, 3,960.90 and 998.99

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Solution

The fourth proportional to 2,643.34, 3,960.90 and 998.99 is: 1,496.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,643.34 : 3,960.90 = 998.99 : x
  2. Step 2: Convert to fraction form
    2,643.34/3,960.90 = 998.99/x
  3. Step 3: Cross multiply
    2,643.34x = 3,960.90 × 998.99
  4. Step 4: Simplify right side
    2,643.34x = 3,956,899.49
  5. Step 5: Solve for x
    x = 3,956,899.49/2,643.34
  6. Step 6: Final answer
    x = 1,496.93

Related Problems

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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.