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Finding the Fourth Proportional to 339,966.80, 509,928.60 and 115,326.80

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Solution

The fourth proportional to 339,966.80, 509,928.60 and 115,326.80 is: 172,982.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,966.80 : 509,928.60 = 115,326.80 : x
  2. Step 2: Convert to fraction form
    339,966.80/509,928.60 = 115,326.80/x
  3. Step 3: Cross multiply
    339,966.80x = 509,928.60 × 115,326.80
  4. Step 4: Simplify right side
    339,966.80x = 58,808,433,666.48
  5. Step 5: Solve for x
    x = 58,808,433,666.48/339,966.80
  6. Step 6: Final answer
    x = 172,982.87

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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.