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Finding the Fourth Proportional to 306,497.28, 422,985.28 and 170,561.56

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Solution

The fourth proportional to 306,497.28, 422,985.28 and 170,561.56 is: 235,385.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    306,497.28 : 422,985.28 = 170,561.56 : x
  2. Step 2: Convert to fraction form
    306,497.28/422,985.28 = 170,561.56/x
  3. Step 3: Cross multiply
    306,497.28x = 422,985.28 × 170,561.56
  4. Step 4: Simplify right side
    306,497.28x = 72,145,029,213.84
  5. Step 5: Solve for x
    x = 72,145,029,213.84/306,497.28
  6. Step 6: Final answer
    x = 235,385.54

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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.