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Finding the Fourth Proportional to 339,403.55, 509,167.80 and 111,711.95

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Solution

The fourth proportional to 339,403.55, 509,167.80 and 111,711.95 is: 167,588.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,403.55 : 509,167.80 = 111,711.95 : x
  2. Step 2: Convert to fraction form
    339,403.55/509,167.80 = 111,711.95/x
  3. Step 3: Cross multiply
    339,403.55x = 509,167.80 × 111,711.95
  4. Step 4: Simplify right side
    339,403.55x = 56,880,127,815.21
  5. Step 5: Solve for x
    x = 56,880,127,815.21/339,403.55
  6. Step 6: Final answer
    x = 167,588.49

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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.