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Finding the Fourth Proportional to 3,903.87, 5,388.57 and 3,705.51

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Solution

The fourth proportional to 3,903.87, 5,388.57 and 3,705.51 is: 5,114.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,903.87 : 5,388.57 = 3,705.51 : x
  2. Step 2: Convert to fraction form
    3,903.87/5,388.57 = 3,705.51/x
  3. Step 3: Cross multiply
    3,903.87x = 5,388.57 × 3,705.51
  4. Step 4: Simplify right side
    3,903.87x = 19,967,400.02
  5. Step 5: Solve for x
    x = 19,967,400.02/3,903.87
  6. Step 6: Final answer
    x = 5,114.77

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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.