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Finding the Fourth Proportional to 256,620.86, 384,906.52 and 79,080.20

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Solution

The fourth proportional to 256,620.86, 384,906.52 and 79,080.20 is: 118,612.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,620.86 : 384,906.52 = 79,080.20 : x
  2. Step 2: Convert to fraction form
    256,620.86/384,906.52 = 79,080.20/x
  3. Step 3: Cross multiply
    256,620.86x = 384,906.52 × 79,080.20
  4. Step 4: Simplify right side
    256,620.86x = 30,438,484,582.90
  5. Step 5: Solve for x
    x = 30,438,484,582.90/256,620.86
  6. Step 6: Final answer
    x = 118,612.67

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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.