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Finding the Fourth Proportional to 5,330.78, 7,980.62 and 3,553.82

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Solution

The fourth proportional to 5,330.78, 7,980.62 and 3,553.82 is: 5,320.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,330.78 : 7,980.62 = 3,553.82 : x
  2. Step 2: Convert to fraction form
    5,330.78/7,980.62 = 3,553.82/x
  3. Step 3: Cross multiply
    5,330.78x = 7,980.62 × 3,553.82
  4. Step 4: Simplify right side
    5,330.78x = 28,361,629.30
  5. Step 5: Solve for x
    x = 28,361,629.30/5,330.78
  6. Step 6: Final answer
    x = 5,320.36

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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.