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Finding the Fourth Proportional to 256,040.72, 353,211.36 and 165,474.80

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Solution

The fourth proportional to 256,040.72, 353,211.36 and 165,474.80 is: 228,274.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,040.72 : 353,211.36 = 165,474.80 : x
  2. Step 2: Convert to fraction form
    256,040.72/353,211.36 = 165,474.80/x
  3. Step 3: Cross multiply
    256,040.72x = 353,211.36 × 165,474.80
  4. Step 4: Simplify right side
    256,040.72x = 58,447,579,153.73
  5. Step 5: Solve for x
    x = 58,447,579,153.73/256,040.72
  6. Step 6: Final answer
    x = 228,274.55

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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.