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Finding the Fourth Proportional to 5,230.78, 7,218.18 and 2,992.54

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Solution

The fourth proportional to 5,230.78, 7,218.18 and 2,992.54 is: 4,129.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,230.78 : 7,218.18 = 2,992.54 : x
  2. Step 2: Convert to fraction form
    5,230.78/7,218.18 = 2,992.54/x
  3. Step 3: Cross multiply
    5,230.78x = 7,218.18 × 2,992.54
  4. Step 4: Simplify right side
    5,230.78x = 21,600,692.38
  5. Step 5: Solve for x
    x = 21,600,692.38/5,230.78
  6. Step 6: Final answer
    x = 4,129.54

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Double scale
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1.5x scale

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.