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Finding the Fourth Proportional to 1,745.51, 2,616.24 and 820.49

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Solution

The fourth proportional to 1,745.51, 2,616.24 and 820.49 is: 1,229.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.51 : 2,616.24 = 820.49 : x
  2. Step 2: Convert to fraction form
    1,745.51/2,616.24 = 820.49/x
  3. Step 3: Cross multiply
    1,745.51x = 2,616.24 × 820.49
  4. Step 4: Simplify right side
    1,745.51x = 2,146,598.76
  5. Step 5: Solve for x
    x = 2,146,598.76/1,745.51
  6. Step 6: Final answer
    x = 1,229.78

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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.