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Finding the Fourth Proportional to 3,945.60, 5,920.47 and 1,482.12

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Solution

The fourth proportional to 3,945.60, 5,920.47 and 1,482.12 is: 2,223.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,945.60 : 5,920.47 = 1,482.12 : x
  2. Step 2: Convert to fraction form
    3,945.60/5,920.47 = 1,482.12/x
  3. Step 3: Cross multiply
    3,945.60x = 5,920.47 × 1,482.12
  4. Step 4: Simplify right side
    3,945.60x = 8,774,847.00
  5. Step 5: Solve for x
    x = 8,774,847.00/3,945.60
  6. Step 6: Final answer
    x = 2,223.96

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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.