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Finding the Fourth Proportional to 407,012.20, 610,518.30 and 207,946.60

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Solution

The fourth proportional to 407,012.20, 610,518.30 and 207,946.60 is: 311,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,012.20 : 610,518.30 = 207,946.60 : x
  2. Step 2: Convert to fraction form
    407,012.20/610,518.30 = 207,946.60/x
  3. Step 3: Cross multiply
    407,012.20x = 610,518.30 × 207,946.60
  4. Step 4: Simplify right side
    407,012.20x = 126,955,204,722.78
  5. Step 5: Solve for x
    x = 126,955,204,722.78/407,012.20
  6. Step 6: Final answer
    x = 311,919.90

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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.