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Finding the Fourth Proportional to 312,884.65, 431,778.21 and 176,945.28

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Solution

The fourth proportional to 312,884.65, 431,778.21 and 176,945.28 is: 244,183.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,884.65 : 431,778.21 = 176,945.28 : x
  2. Step 2: Convert to fraction form
    312,884.65/431,778.21 = 176,945.28/x
  3. Step 3: Cross multiply
    312,884.65x = 431,778.21 × 176,945.28
  4. Step 4: Simplify right side
    312,884.65x = 76,401,117,788.16
  5. Step 5: Solve for x
    x = 76,401,117,788.16/312,884.65
  6. Step 6: Final answer
    x = 244,183.02

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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.