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Finding the Fourth Proportional to 407,450.40, 611,233.20 and 126,938.40

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Solution

The fourth proportional to 407,450.40, 611,233.20 and 126,938.40 is: 190,425.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    407,450.40 : 611,233.20 = 126,938.40 : x
  2. Step 2: Convert to fraction form
    407,450.40/611,233.20 = 126,938.40/x
  3. Step 3: Cross multiply
    407,450.40x = 611,233.20 × 126,938.40
  4. Step 4: Simplify right side
    407,450.40x = 77,588,964,434.88
  5. Step 5: Solve for x
    x = 77,588,964,434.88/407,450.40
  6. Step 6: Final answer
    x = 190,425.54

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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.