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Finding the Fourth Proportional to 719,480.12, 992,876.98 and 397,190.68

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Solution

The fourth proportional to 719,480.12, 992,876.98 and 397,190.68 is: 548,120.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    719,480.12 : 992,876.98 = 397,190.68 : x
  2. Step 2: Convert to fraction form
    719,480.12/992,876.98 = 397,190.68/x
  3. Step 3: Cross multiply
    719,480.12x = 992,876.98 × 397,190.68
  4. Step 4: Simplify right side
    719,480.12x = 394,361,482,842.55
  5. Step 5: Solve for x
    x = 394,361,482,842.55/719,480.12
  6. Step 6: Final answer
    x = 548,120.05

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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.