Home / 426,105.70-639,158.55-268,512.10

Finding the Fourth Proportional to 426,105.70, 639,158.55 and 268,512.10

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Solution

The fourth proportional to 426,105.70, 639,158.55 and 268,512.10 is: 402,768.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,105.70 : 639,158.55 = 268,512.10 : x
  2. Step 2: Convert to fraction form
    426,105.70/639,158.55 = 268,512.10/x
  3. Step 3: Cross multiply
    426,105.70x = 639,158.55 × 268,512.10
  4. Step 4: Simplify right side
    426,105.70x = 171,621,804,493.46
  5. Step 5: Solve for x
    x = 171,621,804,493.46/426,105.70
  6. Step 6: Final answer
    x = 402,768.15

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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.