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Finding the Fourth Proportional to 310,592.73, 428,604.16 and 189,936.21

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Solution

The fourth proportional to 310,592.73, 428,604.16 and 189,936.21 is: 262,103.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,592.73 : 428,604.16 = 189,936.21 : x
  2. Step 2: Convert to fraction form
    310,592.73/428,604.16 = 189,936.21/x
  3. Step 3: Cross multiply
    310,592.73x = 428,604.16 × 189,936.21
  4. Step 4: Simplify right side
    310,592.73x = 81,407,449,740.63
  5. Step 5: Solve for x
    x = 81,407,449,740.63/310,592.73
  6. Step 6: Final answer
    x = 262,103.53

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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.