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Finding the Fourth Proportional to 1,455.36, 2,008.39 and 792.21

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Solution

The fourth proportional to 1,455.36, 2,008.39 and 792.21 is: 1,093.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,455.36 : 2,008.39 = 792.21 : x
  2. Step 2: Convert to fraction form
    1,455.36/2,008.39 = 792.21/x
  3. Step 3: Cross multiply
    1,455.36x = 2,008.39 × 792.21
  4. Step 4: Simplify right side
    1,455.36x = 1,591,064.66
  5. Step 5: Solve for x
    x = 1,591,064.66/1,455.36
  6. Step 6: Final answer
    x = 1,093.25

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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.