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Finding the Fourth Proportional to 407,427.40, 611,198.70 and 126,915.40

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Solution

The fourth proportional to 407,427.40, 611,198.70 and 126,915.40 is: 190,391.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,427.40 : 611,198.70 = 126,915.40 : x
  2. Step 2: Convert to fraction form
    407,427.40/611,198.70 = 126,915.40/x
  3. Step 3: Cross multiply
    407,427.40x = 611,198.70 × 126,915.40
  4. Step 4: Simplify right side
    407,427.40x = 77,570,527,489.98
  5. Step 5: Solve for x
    x = 77,570,527,489.98/407,427.40
  6. Step 6: Final answer
    x = 190,391.04

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1.5x scale

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.