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Finding the Fourth Proportional to 312,863.61, 431,334.12 and 248,546.25

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Solution

The fourth proportional to 312,863.61, 431,334.12 and 248,546.25 is: 342,662.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,863.61 : 431,334.12 = 248,546.25 : x
  2. Step 2: Convert to fraction form
    312,863.61/431,334.12 = 248,546.25/x
  3. Step 3: Cross multiply
    312,863.61x = 431,334.12 × 248,546.25
  4. Step 4: Simplify right side
    312,863.61x = 107,206,478,023.05
  5. Step 5: Solve for x
    x = 107,206,478,023.05/312,863.61
  6. Step 6: Final answer
    x = 342,662.02

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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.