Home / 431,270.30-647,000.64-131,774.28

Finding the Fourth Proportional to 431,270.30, 647,000.64 and 131,774.28

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Solution

The fourth proportional to 431,270.30, 647,000.64 and 131,774.28 is: 197,690.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,270.30 : 647,000.64 = 131,774.28 : x
  2. Step 2: Convert to fraction form
    431,270.30/647,000.64 = 131,774.28/x
  3. Step 3: Cross multiply
    431,270.30x = 647,000.64 × 131,774.28
  4. Step 4: Simplify right side
    431,270.30x = 85,258,043,495.54
  5. Step 5: Solve for x
    x = 85,258,043,495.54/431,270.30
  6. Step 6: Final answer
    x = 197,690.51

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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.