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Finding the Fourth Proportional to 2,560.60, 3,840.76 and 805.56

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Solution

The fourth proportional to 2,560.60, 3,840.76 and 805.56 is: 1,208.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,560.60 : 3,840.76 = 805.56 : x
  2. Step 2: Convert to fraction form
    2,560.60/3,840.76 = 805.56/x
  3. Step 3: Cross multiply
    2,560.60x = 3,840.76 × 805.56
  4. Step 4: Simplify right side
    2,560.60x = 3,093,962.63
  5. Step 5: Solve for x
    x = 3,093,962.63/2,560.60
  6. Step 6: Final answer
    x = 1,208.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.