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Finding the Fourth Proportional to 512,993.88, 769,490.64 and 139,016.88

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Solution

The fourth proportional to 512,993.88, 769,490.64 and 139,016.88 is: 208,525.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,993.88 : 769,490.64 = 139,016.88 : x
  2. Step 2: Convert to fraction form
    512,993.88/769,490.64 = 139,016.88/x
  3. Step 3: Cross multiply
    512,993.88x = 769,490.64 × 139,016.88
  4. Step 4: Simplify right side
    512,993.88x = 106,972,187,962.00
  5. Step 5: Solve for x
    x = 106,972,187,962.00/512,993.88
  6. Step 6: Final answer
    x = 208,525.27

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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.