Home / 426,388.08-639,470.70-126,788.04

Finding the Fourth Proportional to 426,388.08, 639,470.70 and 126,788.04

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Solution

The fourth proportional to 426,388.08, 639,470.70 and 126,788.04 is: 190,148.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,388.08 : 639,470.70 = 126,788.04 : x
  2. Step 2: Convert to fraction form
    426,388.08/639,470.70 = 126,788.04/x
  3. Step 3: Cross multiply
    426,388.08x = 639,470.70 × 126,788.04
  4. Step 4: Simplify right side
    426,388.08x = 81,077,236,690.43
  5. Step 5: Solve for x
    x = 81,077,236,690.43/426,388.08
  6. Step 6: Final answer
    x = 190,148.93

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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.