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Finding the Fourth Proportional to 305,341.02, 421,421.02 and 169,418.70

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Solution

The fourth proportional to 305,341.02, 421,421.02 and 169,418.70 is: 233,825.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,341.02 : 421,421.02 = 169,418.70 : x
  2. Step 2: Convert to fraction form
    305,341.02/421,421.02 = 169,418.70/x
  3. Step 3: Cross multiply
    305,341.02x = 421,421.02 × 169,418.70
  4. Step 4: Simplify right side
    305,341.02x = 71,396,601,361.07
  5. Step 5: Solve for x
    x = 71,396,601,361.07/305,341.02
  6. Step 6: Final answer
    x = 233,825.78

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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.