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Finding the Fourth Proportional to 307,680.60, 461,520.90 and 255,149.40

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Solution

The fourth proportional to 307,680.60, 461,520.90 and 255,149.40 is: 382,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,680.60 : 461,520.90 = 255,149.40 : x
  2. Step 2: Convert to fraction form
    307,680.60/461,520.90 = 255,149.40/x
  3. Step 3: Cross multiply
    307,680.60x = 461,520.90 × 255,149.40
  4. Step 4: Simplify right side
    307,680.60x = 117,756,780,722.46
  5. Step 5: Solve for x
    x = 117,756,780,722.46/307,680.60
  6. Step 6: Final answer
    x = 382,724.10

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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.