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Finding the Fourth Proportional to 426,041.80, 639,062.70 and 126,568.60

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Solution

The fourth proportional to 426,041.80, 639,062.70 and 126,568.60 is: 189,852.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,041.80 : 639,062.70 = 126,568.60 : x
  2. Step 2: Convert to fraction form
    426,041.80/639,062.70 = 126,568.60/x
  3. Step 3: Cross multiply
    426,041.80x = 639,062.70 × 126,568.60
  4. Step 4: Simplify right side
    426,041.80x = 80,885,271,251.22
  5. Step 5: Solve for x
    x = 80,885,271,251.22/426,041.80
  6. Step 6: Final answer
    x = 189,852.90

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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.