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Finding the Fourth Proportional to 305,347.95, 421,382.70 and 169,390.80

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Solution

The fourth proportional to 305,347.95, 421,382.70 and 169,390.80 is: 233,760.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,347.95 : 421,382.70 = 169,390.80 : x
  2. Step 2: Convert to fraction form
    305,347.95/421,382.70 = 169,390.80/x
  3. Step 3: Cross multiply
    305,347.95x = 421,382.70 × 169,390.80
  4. Step 4: Simplify right side
    305,347.95x = 71,378,352,659.16
  5. Step 5: Solve for x
    x = 71,378,352,659.16/305,347.95
  6. Step 6: Final answer
    x = 233,760.71

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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.