Home / 1,144.64-1,579.60-620.66

Finding the Fourth Proportional to 1,144.64, 1,579.60 and 620.66

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Solution

The fourth proportional to 1,144.64, 1,579.60 and 620.66 is: 856.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,144.64 : 1,579.60 = 620.66 : x
  2. Step 2: Convert to fraction form
    1,144.64/1,579.60 = 620.66/x
  3. Step 3: Cross multiply
    1,144.64x = 1,579.60 × 620.66
  4. Step 4: Simplify right side
    1,144.64x = 980,396.93
  5. Step 5: Solve for x
    x = 980,396.93/1,144.64
  6. Step 6: Final answer
    x = 856.51

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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.