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Finding the Fourth Proportional to 339,590.98, 509,620.47 and 139,911.67

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Solution

The fourth proportional to 339,590.98, 509,620.47 and 139,911.67 is: 209,963.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,590.98 : 509,620.47 = 139,911.67 : x
  2. Step 2: Convert to fraction form
    339,590.98/509,620.47 = 139,911.67/x
  3. Step 3: Cross multiply
    339,590.98x = 509,620.47 × 139,911.67
  4. Step 4: Simplify right side
    339,590.98x = 71,301,851,023.88
  5. Step 5: Solve for x
    x = 71,301,851,023.88/339,590.98
  6. Step 6: Final answer
    x = 209,963.91

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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.