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Finding the Fourth Proportional to 1,745.48, 2,617.85 and 512.55

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Solution

The fourth proportional to 1,745.48, 2,617.85 and 512.55 is: 768.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,745.48 : 2,617.85 = 512.55 : x
  2. Step 2: Convert to fraction form
    1,745.48/2,617.85 = 512.55/x
  3. Step 3: Cross multiply
    1,745.48x = 2,617.85 × 512.55
  4. Step 4: Simplify right side
    1,745.48x = 1,341,780.30
  5. Step 5: Solve for x
    x = 1,341,780.30/1,745.48
  6. Step 6: Final answer
    x = 768.72

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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.