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Finding the Fourth Proportional to 656,346.88, 905,759.50 and 354,540.88

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Solution

The fourth proportional to 656,346.88, 905,759.50 and 354,540.88 is: 489,266.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,346.88 : 905,759.50 = 354,540.88 : x
  2. Step 2: Convert to fraction form
    656,346.88/905,759.50 = 354,540.88/x
  3. Step 3: Cross multiply
    656,346.88x = 905,759.50 × 354,540.88
  4. Step 4: Simplify right side
    656,346.88x = 321,128,765,669.56
  5. Step 5: Solve for x
    x = 321,128,765,669.56/656,346.88
  6. Step 6: Final answer
    x = 489,266.85

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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.