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Finding the Fourth Proportional to 339,721.44, 509,643.44 and 139,932.76

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Solution

The fourth proportional to 339,721.44, 509,643.44 and 139,932.76 is: 209,924.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,721.44 : 509,643.44 = 139,932.76 : x
  2. Step 2: Convert to fraction form
    339,721.44/509,643.44 = 139,932.76/x
  3. Step 3: Cross multiply
    339,721.44x = 509,643.44 × 139,932.76
  4. Step 4: Simplify right side
    339,721.44x = 71,315,813,175.09
  5. Step 5: Solve for x
    x = 71,315,813,175.09/339,721.44
  6. Step 6: Final answer
    x = 209,924.38

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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.