Home / 426,000.30-639,000.45-126,527.10

Finding the Fourth Proportional to 426,000.30, 639,000.45 and 126,527.10

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Solution

The fourth proportional to 426,000.30, 639,000.45 and 126,527.10 is: 189,790.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,000.30 : 639,000.45 = 126,527.10 : x
  2. Step 2: Convert to fraction form
    426,000.30/639,000.45 = 126,527.10/x
  3. Step 3: Cross multiply
    426,000.30x = 639,000.45 × 126,527.10
  4. Step 4: Simplify right side
    426,000.30x = 80,850,873,837.20
  5. Step 5: Solve for x
    x = 80,850,873,837.20/426,000.30
  6. Step 6: Final answer
    x = 189,790.65

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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.