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Finding the Fourth Proportional to 312,820.05, 469,234.65 and 216,662.43

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Solution

The fourth proportional to 312,820.05, 469,234.65 and 216,662.43 is: 324,996.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,820.05 : 469,234.65 = 216,662.43 : x
  2. Step 2: Convert to fraction form
    312,820.05/469,234.65 = 216,662.43/x
  3. Step 3: Cross multiply
    312,820.05x = 469,234.65 × 216,662.43
  4. Step 4: Simplify right side
    312,820.05x = 101,665,519,509.20
  5. Step 5: Solve for x
    x = 101,665,519,509.20/312,820.05
  6. Step 6: Final answer
    x = 324,996.81

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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.