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Finding the Fourth Proportional to 680,469.88, 939,041 and 374,539.72

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Solution

The fourth proportional to 680,469.88, 939,041 and 374,539.72 is: 516,860.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,469.88 : 939,041 = 374,539.72 : x
  2. Step 2: Convert to fraction form
    680,469.88/939,041 = 374,539.72/x
  3. Step 3: Cross multiply
    680,469.88x = 939,041 × 374,539.72
  4. Step 4: Simplify right side
    680,469.88x = 351,708,153,208.52
  5. Step 5: Solve for x
    x = 351,708,153,208.52/680,469.88
  6. Step 6: Final answer
    x = 516,860.72

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1.5x scale

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.