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Finding the Fourth Proportional to 3,486.72, 5,230.40 and 1,146.73

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Solution

The fourth proportional to 3,486.72, 5,230.40 and 1,146.73 is: 1,720.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,486.72 : 5,230.40 = 1,146.73 : x
  2. Step 2: Convert to fraction form
    3,486.72/5,230.40 = 1,146.73/x
  3. Step 3: Cross multiply
    3,486.72x = 5,230.40 × 1,146.73
  4. Step 4: Simplify right side
    3,486.72x = 5,997,865.53
  5. Step 5: Solve for x
    x = 5,997,865.53/3,486.72
  6. Step 6: Final answer
    x = 1,720.20

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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.