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Finding the Fourth Proportional to 874,489.58, 1,310,598.21 and 394,364.78

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Solution

The fourth proportional to 874,489.58, 1,310,598.21 and 394,364.78 is: 591,034.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    874,489.58 : 1,310,598.21 = 394,364.78 : x
  2. Step 2: Convert to fraction form
    874,489.58/1,310,598.21 = 394,364.78/x
  3. Step 3: Cross multiply
    874,489.58x = 1,310,598.21 × 394,364.78
  4. Step 4: Simplify right side
    874,489.58x = 516,853,774,755.04
  5. Step 5: Solve for x
    x = 516,853,774,755.04/874,489.58
  6. Step 6: Final answer
    x = 591,034.80

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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.