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Finding the Fourth Proportional to 305,649.16, 421,799.52 and 169,685.80

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Solution

The fourth proportional to 305,649.16, 421,799.52 and 169,685.80 is: 234,168.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,649.16 : 421,799.52 = 169,685.80 : x
  2. Step 2: Convert to fraction form
    305,649.16/421,799.52 = 169,685.80/x
  3. Step 3: Cross multiply
    305,649.16x = 421,799.52 × 169,685.80
  4. Step 4: Simplify right side
    305,649.16x = 71,573,388,990.82
  5. Step 5: Solve for x
    x = 71,573,388,990.82/305,649.16
  6. Step 6: Final answer
    x = 234,168.45

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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.