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Finding the Fourth Proportional to 257,245.86, 385,883.38 and 79,778.10

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Solution

The fourth proportional to 257,245.86, 385,883.38 and 79,778.10 is: 119,671.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,245.86 : 385,883.38 = 79,778.10 : x
  2. Step 2: Convert to fraction form
    257,245.86/385,883.38 = 79,778.10/x
  3. Step 3: Cross multiply
    257,245.86x = 385,883.38 × 79,778.10
  4. Step 4: Simplify right side
    257,245.86x = 30,785,042,877.98
  5. Step 5: Solve for x
    x = 30,785,042,877.98/257,245.86
  6. Step 6: Final answer
    x = 119,671.67

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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.