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Finding the Fourth Proportional to 591,274.59, 815,958.77 and 319,342.40

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Solution

The fourth proportional to 591,274.59, 815,958.77 and 319,342.40 is: 440,692.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,274.59 : 815,958.77 = 319,342.40 : x
  2. Step 2: Convert to fraction form
    591,274.59/815,958.77 = 319,342.40/x
  3. Step 3: Cross multiply
    591,274.59x = 815,958.77 × 319,342.40
  4. Step 4: Simplify right side
    591,274.59x = 260,570,229,296.19
  5. Step 5: Solve for x
    x = 260,570,229,296.19/591,274.59
  6. Step 6: Final answer
    x = 440,692.42

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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.