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Finding the Fourth Proportional to 421,078.60, 631,310.70 and 171,632.20

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Solution

The fourth proportional to 421,078.60, 631,310.70 and 171,632.20 is: 257,323.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,078.60 : 631,310.70 = 171,632.20 : x
  2. Step 2: Convert to fraction form
    421,078.60/631,310.70 = 171,632.20/x
  3. Step 3: Cross multiply
    421,078.60x = 631,310.70 × 171,632.20
  4. Step 4: Simplify right side
    421,078.60x = 108,353,244,324.54
  5. Step 5: Solve for x
    x = 108,353,244,324.54/421,078.60
  6. Step 6: Final answer
    x = 257,323.08

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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.