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Finding the Fourth Proportional to 619,810.42, 930,213.78 and 320,378.71

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Solution

The fourth proportional to 619,810.42, 930,213.78 and 320,378.71 is: 480,825.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    619,810.42 : 930,213.78 = 320,378.71 : x
  2. Step 2: Convert to fraction form
    619,810.42/930,213.78 = 320,378.71/x
  3. Step 3: Cross multiply
    619,810.42x = 930,213.78 × 320,378.71
  4. Step 4: Simplify right side
    619,810.42x = 298,020,690,860.62
  5. Step 5: Solve for x
    x = 298,020,690,860.62/619,810.42
  6. Step 6: Final answer
    x = 480,825.56

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.