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Finding the Fourth Proportional to 339,720.67, 509,642.30 and 139,932.01

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Solution

The fourth proportional to 339,720.67, 509,642.30 and 139,932.01 is: 209,923.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,720.67 : 509,642.30 = 139,932.01 : x
  2. Step 2: Convert to fraction form
    339,720.67/509,642.30 = 139,932.01/x
  3. Step 3: Cross multiply
    339,720.67x = 509,642.30 × 139,932.01
  4. Step 4: Simplify right side
    339,720.67x = 71,315,270,720.36
  5. Step 5: Solve for x
    x = 71,315,270,720.36/339,720.67
  6. Step 6: Final answer
    x = 209,923.26

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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.