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Finding the Fourth Proportional to 303,421.20, 455,185.20 and 103,694.64

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Solution

The fourth proportional to 303,421.20, 455,185.20 and 103,694.64 is: 155,560.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,421.20 : 455,185.20 = 103,694.64 : x
  2. Step 2: Convert to fraction form
    303,421.20/455,185.20 = 103,694.64/x
  3. Step 3: Cross multiply
    303,421.20x = 455,185.20 × 103,694.64
  4. Step 4: Simplify right side
    303,421.20x = 47,200,265,447.33
  5. Step 5: Solve for x
    x = 47,200,265,447.33/303,421.20
  6. Step 6: Final answer
    x = 155,560.21

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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.