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Finding the Fourth Proportional to 309,021.67, 426,493.11 and 223,258.21

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Solution

The fourth proportional to 309,021.67, 426,493.11 and 223,258.21 is: 308,127.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    309,021.67 : 426,493.11 = 223,258.21 : x
  2. Step 2: Convert to fraction form
    309,021.67/426,493.11 = 223,258.21/x
  3. Step 3: Cross multiply
    309,021.67x = 426,493.11 × 223,258.21
  4. Step 4: Simplify right side
    309,021.67x = 95,218,088,315.93
  5. Step 5: Solve for x
    x = 95,218,088,315.93/309,021.67
  6. Step 6: Final answer
    x = 308,127.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.