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Finding the Fourth Proportional to 578,403.22, 866,474.86 and 398,456.86

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Solution

The fourth proportional to 578,403.22, 866,474.86 and 398,456.86 is: 596,906.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,403.22 : 866,474.86 = 398,456.86 : x
  2. Step 2: Convert to fraction form
    578,403.22/866,474.86 = 398,456.86/x
  3. Step 3: Cross multiply
    578,403.22x = 866,474.86 × 398,456.86
  4. Step 4: Simplify right side
    578,403.22x = 345,252,851,984.54
  5. Step 5: Solve for x
    x = 345,252,851,984.54/578,403.22
  6. Step 6: Final answer
    x = 596,906.86

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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.