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Finding the Fourth Proportional to 3,992.92, 5,510.52 and 2,421.16

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Solution

The fourth proportional to 3,992.92, 5,510.52 and 2,421.16 is: 3,341.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,992.92 : 5,510.52 = 2,421.16 : x
  2. Step 2: Convert to fraction form
    3,992.92/5,510.52 = 2,421.16/x
  3. Step 3: Cross multiply
    3,992.92x = 5,510.52 × 2,421.16
  4. Step 4: Simplify right side
    3,992.92x = 13,341,850.60
  5. Step 5: Solve for x
    x = 13,341,850.60/3,992.92
  6. Step 6: Final answer
    x = 3,341.38

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Half scale
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Double scale
Find fourth proportional to 3,993.92, 5,511.90 and 2,422.16
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.