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Finding the Fourth Proportional to 305,131.61, 421,106.46 and 169,208.12

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Solution

The fourth proportional to 305,131.61, 421,106.46 and 169,208.12 is: 233,520.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,131.61 : 421,106.46 = 169,208.12 : x
  2. Step 2: Convert to fraction form
    305,131.61/421,106.46 = 169,208.12/x
  3. Step 3: Cross multiply
    305,131.61x = 421,106.46 × 169,208.12
  4. Step 4: Simplify right side
    305,131.61x = 71,254,632,416.46
  5. Step 5: Solve for x
    x = 71,254,632,416.46/305,131.61
  6. Step 6: Final answer
    x = 233,520.98

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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.