Home / 339,945.40-509,966.70-115,316.20

Finding the Fourth Proportional to 339,945.40, 509,966.70 and 115,316.20

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Solution

The fourth proportional to 339,945.40, 509,966.70 and 115,316.20 is: 172,990.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,945.40 : 509,966.70 = 115,316.20 : x
  2. Step 2: Convert to fraction form
    339,945.40/509,966.70 = 115,316.20/x
  3. Step 3: Cross multiply
    339,945.40x = 509,966.70 × 115,316.20
  4. Step 4: Simplify right side
    339,945.40x = 58,807,421,970.54
  5. Step 5: Solve for x
    x = 58,807,421,970.54/339,945.40
  6. Step 6: Final answer
    x = 172,990.79

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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.