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Finding the Fourth Proportional to 496,534.28, 685,215.42 and 281,715.80

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Solution

The fourth proportional to 496,534.28, 685,215.42 and 281,715.80 is: 388,766.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    496,534.28 : 685,215.42 = 281,715.80 : x
  2. Step 2: Convert to fraction form
    496,534.28/685,215.42 = 281,715.80/x
  3. Step 3: Cross multiply
    496,534.28x = 685,215.42 × 281,715.80
  4. Step 4: Simplify right side
    496,534.28x = 193,036,010,217.64
  5. Step 5: Solve for x
    x = 193,036,010,217.64/496,534.28
  6. Step 6: Final answer
    x = 388,766.73

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.