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Finding the Fourth Proportional to 256,615.56, 384,898.60 and 79,074.90

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Solution

The fourth proportional to 256,615.56, 384,898.60 and 79,074.90 is: 118,604.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,615.56 : 384,898.60 = 79,074.90 : x
  2. Step 2: Convert to fraction form
    256,615.56/384,898.60 = 79,074.90/x
  3. Step 3: Cross multiply
    256,615.56x = 384,898.60 × 79,074.90
  4. Step 4: Simplify right side
    256,615.56x = 30,435,818,403.98
  5. Step 5: Solve for x
    x = 30,435,818,403.98/256,615.56
  6. Step 6: Final answer
    x = 118,604.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.