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Finding the Fourth Proportional to 313,468.20, 470,202.30 and 218,989.80

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Solution

The fourth proportional to 313,468.20, 470,202.30 and 218,989.80 is: 328,484.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    313,468.20 : 470,202.30 = 218,989.80 : x
  2. Step 2: Convert to fraction form
    313,468.20/470,202.30 = 218,989.80/x
  3. Step 3: Cross multiply
    313,468.20x = 470,202.30 × 218,989.80
  4. Step 4: Simplify right side
    313,468.20x = 102,969,507,636.54
  5. Step 5: Solve for x
    x = 102,969,507,636.54/313,468.20
  6. Step 6: Final answer
    x = 328,484.70

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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.