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Finding the Fourth Proportional to 339,442.71, 508,968.95 and 139,900.83

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Solution

The fourth proportional to 339,442.71, 508,968.95 and 139,900.83 is: 209,770.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,442.71 : 508,968.95 = 139,900.83 : x
  2. Step 2: Convert to fraction form
    339,442.71/508,968.95 = 139,900.83/x
  3. Step 3: Cross multiply
    339,442.71x = 508,968.95 × 139,900.83
  4. Step 4: Simplify right side
    339,442.71x = 71,205,177,849.72
  5. Step 5: Solve for x
    x = 71,205,177,849.72/339,442.71
  6. Step 6: Final answer
    x = 209,770.83

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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.