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Finding the Fourth Proportional to 339,656.14, 509,713.32 and 139,972.10

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Solution

The fourth proportional to 339,656.14, 509,713.32 and 139,972.10 is: 210,052.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,656.14 : 509,713.32 = 139,972.10 : x
  2. Step 2: Convert to fraction form
    339,656.14/509,713.32 = 139,972.10/x
  3. Step 3: Cross multiply
    339,656.14x = 509,713.32 × 139,972.10
  4. Step 4: Simplify right side
    339,656.14x = 71,345,643,798.37
  5. Step 5: Solve for x
    x = 71,345,643,798.37/339,656.14
  6. Step 6: Final answer
    x = 210,052.57

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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.