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Finding the Fourth Proportional to 3,410.75, 4,707.78 and 1,994.75

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Solution

The fourth proportional to 3,410.75, 4,707.78 and 1,994.75 is: 2,753.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,410.75 : 4,707.78 = 1,994.75 : x
  2. Step 2: Convert to fraction form
    3,410.75/4,707.78 = 1,994.75/x
  3. Step 3: Cross multiply
    3,410.75x = 4,707.78 × 1,994.75
  4. Step 4: Simplify right side
    3,410.75x = 9,390,844.16
  5. Step 5: Solve for x
    x = 9,390,844.16/3,410.75
  6. Step 6: Final answer
    x = 2,753.31

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Find fourth proportional to 1,705.38, 2,353.89 and 997.38
Half scale
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Double scale
Find fourth proportional to 3,411.75, 4,709.16 and 1,995.75
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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.