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Finding the Fourth Proportional to 343,890.80, 515,578.08 and 119,172.32

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Solution

The fourth proportional to 343,890.80, 515,578.08 and 119,172.32 is: 178,669.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,890.80 : 515,578.08 = 119,172.32 : x
  2. Step 2: Convert to fraction form
    343,890.80/515,578.08 = 119,172.32/x
  3. Step 3: Cross multiply
    343,890.80x = 515,578.08 × 119,172.32
  4. Step 4: Simplify right side
    343,890.80x = 61,442,635,934.75
  5. Step 5: Solve for x
    x = 61,442,635,934.75/343,890.80
  6. Step 6: Final answer
    x = 178,669.03

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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.