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Finding the Fourth Proportional to 298,711.80, 448,067.70 and 266,052.60

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Solution

The fourth proportional to 298,711.80, 448,067.70 and 266,052.60 is: 399,078.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    298,711.80 : 448,067.70 = 266,052.60 : x
  2. Step 2: Convert to fraction form
    298,711.80/448,067.70 = 266,052.60/x
  3. Step 3: Cross multiply
    298,711.80x = 448,067.70 × 266,052.60
  4. Step 4: Simplify right side
    298,711.80x = 119,209,576,561.02
  5. Step 5: Solve for x
    x = 119,209,576,561.02/298,711.80
  6. Step 6: Final answer
    x = 399,078.90

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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.