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Finding the Fourth Proportional to 685,490.55, 946,092.10 and 399,179.44

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Solution

The fourth proportional to 685,490.55, 946,092.10 and 399,179.44 is: 550,934.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    685,490.55 : 946,092.10 = 399,179.44 : x
  2. Step 2: Convert to fraction form
    685,490.55/946,092.10 = 399,179.44/x
  3. Step 3: Cross multiply
    685,490.55x = 946,092.10 × 399,179.44
  4. Step 4: Simplify right side
    685,490.55x = 377,660,515,599.55
  5. Step 5: Solve for x
    x = 377,660,515,599.55/685,490.55
  6. Step 6: Final answer
    x = 550,934.68

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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.