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Finding the Fourth Proportional to 431,455.37, 647,182.74 and 115,912.13

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Solution

The fourth proportional to 431,455.37, 647,182.74 and 115,912.13 is: 173,868.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,455.37 : 647,182.74 = 115,912.13 : x
  2. Step 2: Convert to fraction form
    431,455.37/647,182.74 = 115,912.13/x
  3. Step 3: Cross multiply
    431,455.37x = 647,182.74 × 115,912.13
  4. Step 4: Simplify right side
    431,455.37x = 75,016,329,892.64
  5. Step 5: Solve for x
    x = 75,016,329,892.64/431,455.37
  6. Step 6: Final answer
    x = 173,868.11

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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.