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Finding the Fourth Proportional to 303,369.20, 455,399.40 and 178,780.40

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Solution

The fourth proportional to 303,369.20, 455,399.40 and 178,780.40 is: 268,374.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    303,369.20 : 455,399.40 = 178,780.40 : x
  2. Step 2: Convert to fraction form
    303,369.20/455,399.40 = 178,780.40/x
  3. Step 3: Cross multiply
    303,369.20x = 455,399.40 × 178,780.40
  4. Step 4: Simplify right side
    303,369.20x = 81,416,486,891.76
  5. Step 5: Solve for x
    x = 81,416,486,891.76/303,369.20
  6. Step 6: Final answer
    x = 268,374.27

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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.