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Finding the Fourth Proportional to 305,341.76, 421,378.38 and 169,371.27

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Solution

The fourth proportional to 305,341.76, 421,378.38 and 169,371.27 is: 233,736.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,341.76 : 421,378.38 = 169,371.27 : x
  2. Step 2: Convert to fraction form
    305,341.76/421,378.38 = 169,371.27/x
  3. Step 3: Cross multiply
    305,341.76x = 421,378.38 × 169,371.27
  4. Step 4: Simplify right side
    305,341.76x = 71,369,391,371.14
  5. Step 5: Solve for x
    x = 71,369,391,371.14/305,341.76
  6. Step 6: Final answer
    x = 233,736.10

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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.