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Finding the Fourth Proportional to 339,775.80, 509,345.37 and 114,978.86

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Solution

The fourth proportional to 339,775.80, 509,345.37 and 114,978.86 is: 172,360.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,775.80 : 509,345.37 = 114,978.86 : x
  2. Step 2: Convert to fraction form
    339,775.80/509,345.37 = 114,978.86/x
  3. Step 3: Cross multiply
    339,775.80x = 509,345.37 × 114,978.86
  4. Step 4: Simplify right side
    339,775.80x = 58,563,949,988.88
  5. Step 5: Solve for x
    x = 58,563,949,988.88/339,775.80
  6. Step 6: Final answer
    x = 172,360.57

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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.