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Finding the Fourth Proportional to 305,341.57, 421,378.13 and 169,371.10

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Solution

The fourth proportional to 305,341.57, 421,378.13 and 169,371.10 is: 233,735.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,341.57 : 421,378.13 = 169,371.10 : x
  2. Step 2: Convert to fraction form
    305,341.57/421,378.13 = 169,371.10/x
  3. Step 3: Cross multiply
    305,341.57x = 421,378.13 × 169,371.10
  4. Step 4: Simplify right side
    305,341.57x = 71,369,274,440.30
  5. Step 5: Solve for x
    x = 71,369,274,440.30/305,341.57
  6. Step 6: Final answer
    x = 233,735.86

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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.