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Finding the Fourth Proportional to 339,847.20, 509,769 and 87,127.20

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Solution

The fourth proportional to 339,847.20, 509,769 and 87,127.20 is: 130,690.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,847.20 : 509,769 = 87,127.20 : x
  2. Step 2: Convert to fraction form
    339,847.20/509,769 = 87,127.20/x
  3. Step 3: Cross multiply
    339,847.20x = 509,769 × 87,127.20
  4. Step 4: Simplify right side
    339,847.20x = 44,414,745,616.80
  5. Step 5: Solve for x
    x = 44,414,745,616.80/339,847.20
  6. Step 6: Final answer
    x = 130,690.34

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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.