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Finding the Fourth Proportional to 426,188.48, 639,172.02 and 126,598.64

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Solution

The fourth proportional to 426,188.48, 639,172.02 and 126,598.64 is: 189,865.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,188.48 : 639,172.02 = 126,598.64 : x
  2. Step 2: Convert to fraction form
    426,188.48/639,172.02 = 126,598.64/x
  3. Step 3: Cross multiply
    426,188.48x = 639,172.02 × 126,598.64
  4. Step 4: Simplify right side
    426,188.48x = 80,918,308,458.05
  5. Step 5: Solve for x
    x = 80,918,308,458.05/426,188.48
  6. Step 6: Final answer
    x = 189,865.08

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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.