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Finding the Fourth Proportional to 256,512.30, 384,804.90 and 79,000.80

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Solution

The fourth proportional to 256,512.30, 384,804.90 and 79,000.80 is: 118,512.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,512.30 : 384,804.90 = 79,000.80 : x
  2. Step 2: Convert to fraction form
    256,512.30/384,804.90 = 79,000.80/x
  3. Step 3: Cross multiply
    256,512.30x = 384,804.90 × 79,000.80
  4. Step 4: Simplify right side
    256,512.30x = 30,399,894,943.92
  5. Step 5: Solve for x
    x = 30,399,894,943.92/256,512.30
  6. Step 6: Final answer
    x = 118,512.43

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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.