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Finding the Fourth Proportional to 305,411.10, 421,453.08 and 169,443.60

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Solution

The fourth proportional to 305,411.10, 421,453.08 and 169,443.60 is: 233,824.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,411.10 : 421,453.08 = 169,443.60 : x
  2. Step 2: Convert to fraction form
    305,411.10/421,453.08 = 169,443.60/x
  3. Step 3: Cross multiply
    305,411.10x = 421,453.08 × 169,443.60
  4. Step 4: Simplify right side
    305,411.10x = 71,412,527,106.29
  5. Step 5: Solve for x
    x = 71,412,527,106.29/305,411.10
  6. Step 6: Final answer
    x = 233,824.27

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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.