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Finding the Fourth Proportional to 299,387.80, 448,425.60 and 266,145.40

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Solution

The fourth proportional to 299,387.80, 448,425.60 and 266,145.40 is: 398,634.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    299,387.80 : 448,425.60 = 266,145.40 : x
  2. Step 2: Convert to fraction form
    299,387.80/448,425.60 = 266,145.40/x
  3. Step 3: Cross multiply
    299,387.80x = 448,425.60 × 266,145.40
  4. Step 4: Simplify right side
    299,387.80x = 119,346,410,682.24
  5. Step 5: Solve for x
    x = 119,346,410,682.24/299,387.80
  6. Step 6: Final answer
    x = 398,634.85

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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.