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Finding the Fourth Proportional to 1,347.45, 2,021.16 and 481.75

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Solution

The fourth proportional to 1,347.45, 2,021.16 and 481.75 is: 722.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.45 : 2,021.16 = 481.75 : x
  2. Step 2: Convert to fraction form
    1,347.45/2,021.16 = 481.75/x
  3. Step 3: Cross multiply
    1,347.45x = 2,021.16 × 481.75
  4. Step 4: Simplify right side
    1,347.45x = 973,693.83
  5. Step 5: Solve for x
    x = 973,693.83/1,347.45
  6. Step 6: Final answer
    x = 722.62

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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.