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Finding the Fourth Proportional to 1,347.55, 2,021.45 and 481.87

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Solution

The fourth proportional to 1,347.55, 2,021.45 and 481.87 is: 722.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,347.55 : 2,021.45 = 481.87 : x
  2. Step 2: Convert to fraction form
    1,347.55/2,021.45 = 481.87/x
  3. Step 3: Cross multiply
    1,347.55x = 2,021.45 × 481.87
  4. Step 4: Simplify right side
    1,347.55x = 974,076.11
  5. Step 5: Solve for x
    x = 974,076.11/1,347.55
  6. Step 6: Final answer
    x = 722.85

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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.