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Finding the Fourth Proportional to 591,418.81, 816,157.20 and 319,486.60

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Solution

The fourth proportional to 591,418.81, 816,157.20 and 319,486.60 is: 440,891.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,418.81 : 816,157.20 = 319,486.60 : x
  2. Step 2: Convert to fraction form
    591,418.81/816,157.20 = 319,486.60/x
  3. Step 3: Cross multiply
    591,418.81x = 816,157.20 × 319,486.60
  4. Step 4: Simplify right side
    591,418.81x = 260,751,288,893.52
  5. Step 5: Solve for x
    x = 260,751,288,893.52/591,418.81
  6. Step 6: Final answer
    x = 440,891.10

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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.