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Finding the Fourth Proportional to 321,292.80, 481,939.20 and 306,086.40

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Solution

The fourth proportional to 321,292.80, 481,939.20 and 306,086.40 is: 459,129.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    321,292.80 : 481,939.20 = 306,086.40 : x
  2. Step 2: Convert to fraction form
    321,292.80/481,939.20 = 306,086.40/x
  3. Step 3: Cross multiply
    321,292.80x = 481,939.20 × 306,086.40
  4. Step 4: Simplify right side
    321,292.80x = 147,515,034,746.88
  5. Step 5: Solve for x
    x = 147,515,034,746.88/321,292.80
  6. Step 6: Final answer
    x = 459,129.60

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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.