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Finding the Fourth Proportional to 309,939.40, 464,909.10 and 309,939.40

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Solution

The fourth proportional to 309,939.40, 464,909.10 and 309,939.40 is: 464,909.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,939.40 : 464,909.10 = 309,939.40 : x
  2. Step 2: Convert to fraction form
    309,939.40/464,909.10 = 309,939.40/x
  3. Step 3: Cross multiply
    309,939.40x = 464,909.10 × 309,939.40
  4. Step 4: Simplify right side
    309,939.40x = 144,093,647,508.54
  5. Step 5: Solve for x
    x = 144,093,647,508.54/309,939.40
  6. Step 6: Final answer
    x = 464,909.10

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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.