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Finding the Fourth Proportional to 298,043.80, 447,065.70 and 265,384.60

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Solution

The fourth proportional to 298,043.80, 447,065.70 and 265,384.60 is: 398,076.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,043.80 : 447,065.70 = 265,384.60 : x
  2. Step 2: Convert to fraction form
    298,043.80/447,065.70 = 265,384.60/x
  3. Step 3: Cross multiply
    298,043.80x = 447,065.70 × 265,384.60
  4. Step 4: Simplify right side
    298,043.80x = 118,644,351,968.22
  5. Step 5: Solve for x
    x = 118,644,351,968.22/298,043.80
  6. Step 6: Final answer
    x = 398,076.90

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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.