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Finding the Fourth Proportional to 5,355, 7,390 and 3,230.50

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Solution

The fourth proportional to 5,355, 7,390 and 3,230.50 is: 4,458.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,355 : 7,390 = 3,230.50 : x
  2. Step 2: Convert to fraction form
    5,355/7,390 = 3,230.50/x
  3. Step 3: Cross multiply
    5,355x = 7,390 × 3,230.50
  4. Step 4: Simplify right side
    5,355x = 23,873,395
  5. Step 5: Solve for x
    x = 23,873,395/5,355
  6. Step 6: Final answer
    x = 4,458.15

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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.