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Finding the Fourth Proportional to 705,359.64, 973,456.44 and 399,489.60

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Solution

The fourth proportional to 705,359.64, 973,456.44 and 399,489.60 is: 551,329.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    705,359.64 : 973,456.44 = 399,489.60 : x
  2. Step 2: Convert to fraction form
    705,359.64/973,456.44 = 399,489.60/x
  3. Step 3: Cross multiply
    705,359.64x = 973,456.44 × 399,489.60
  4. Step 4: Simplify right side
    705,359.64x = 388,885,723,833.02
  5. Step 5: Solve for x
    x = 388,885,723,833.02/705,359.64
  6. Step 6: Final answer
    x = 551,329.71

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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.