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Finding the Fourth Proportional to 339,283.08, 508,914.90 and 139,546.80

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Solution

The fourth proportional to 339,283.08, 508,914.90 and 139,546.80 is: 209,316.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,283.08 : 508,914.90 = 139,546.80 : x
  2. Step 2: Convert to fraction form
    339,283.08/508,914.90 = 139,546.80/x
  3. Step 3: Cross multiply
    339,283.08x = 508,914.90 × 139,546.80
  4. Step 4: Simplify right side
    339,283.08x = 71,017,445,767.32
  5. Step 5: Solve for x
    x = 71,017,445,767.32/339,283.08
  6. Step 6: Final answer
    x = 209,316.20

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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.