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Finding the Fourth Proportional to 309,679.20, 462,040.20 and 275,999.40

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Solution

The fourth proportional to 309,679.20, 462,040.20 and 275,999.40 is: 411,790.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,679.20 : 462,040.20 = 275,999.40 : x
  2. Step 2: Convert to fraction form
    309,679.20/462,040.20 = 275,999.40/x
  3. Step 3: Cross multiply
    309,679.20x = 462,040.20 × 275,999.40
  4. Step 4: Simplify right side
    309,679.20x = 127,522,817,975.88
  5. Step 5: Solve for x
    x = 127,522,817,975.88/309,679.20
  6. Step 6: Final answer
    x = 411,790.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.