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Finding the Fourth Proportional to 591,445.97, 889,020.82 and 390,334.41

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Solution

The fourth proportional to 591,445.97, 889,020.82 and 390,334.41 is: 586,723.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    591,445.97 : 889,020.82 = 390,334.41 : x
  2. Step 2: Convert to fraction form
    591,445.97/889,020.82 = 390,334.41/x
  3. Step 3: Cross multiply
    591,445.97x = 889,020.82 × 390,334.41
  4. Step 4: Simplify right side
    591,445.97x = 347,015,415,544.70
  5. Step 5: Solve for x
    x = 347,015,415,544.70/591,445.97
  6. Step 6: Final answer
    x = 586,723.78

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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.