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Finding the Fourth Proportional to 305,176.59, 421,139.34 and 169,210.80

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Solution

The fourth proportional to 305,176.59, 421,139.34 and 169,210.80 is: 233,508.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,176.59 : 421,139.34 = 169,210.80 : x
  2. Step 2: Convert to fraction form
    305,176.59/421,139.34 = 169,210.80/x
  3. Step 3: Cross multiply
    305,176.59x = 421,139.34 × 169,210.80
  4. Step 4: Simplify right side
    305,176.59x = 71,261,324,632.87
  5. Step 5: Solve for x
    x = 71,261,324,632.87/305,176.59
  6. Step 6: Final answer
    x = 233,508.49

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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.