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Finding the Fourth Proportional to 3,855.25, 5,320.25 and 2,458.81

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Solution

The fourth proportional to 3,855.25, 5,320.25 and 2,458.81 is: 3,393.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,855.25 : 5,320.25 = 2,458.81 : x
  2. Step 2: Convert to fraction form
    3,855.25/5,320.25 = 2,458.81/x
  3. Step 3: Cross multiply
    3,855.25x = 5,320.25 × 2,458.81
  4. Step 4: Simplify right side
    3,855.25x = 13,081,483.90
  5. Step 5: Solve for x
    x = 13,081,483.90/3,855.25
  6. Step 6: Final answer
    x = 3,393.16

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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.