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Finding the Fourth Proportional to 492,839.80, 739,086.90 and 256,103.80

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Solution

The fourth proportional to 492,839.80, 739,086.90 and 256,103.80 is: 384,065.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    492,839.80 : 739,086.90 = 256,103.80 : x
  2. Step 2: Convert to fraction form
    492,839.80/739,086.90 = 256,103.80/x
  3. Step 3: Cross multiply
    492,839.80x = 739,086.90 × 256,103.80
  4. Step 4: Simplify right side
    492,839.80x = 189,282,963,620.22
  5. Step 5: Solve for x
    x = 189,282,963,620.22/492,839.80
  6. Step 6: Final answer
    x = 384,065.90

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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.