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Finding the Fourth Proportional to 339,945.80, 509,918.70 and 286,801.70

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Solution

The fourth proportional to 339,945.80, 509,918.70 and 286,801.70 is: 430,202.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,945.80 : 509,918.70 = 286,801.70 : x
  2. Step 2: Convert to fraction form
    339,945.80/509,918.70 = 286,801.70/x
  3. Step 3: Cross multiply
    339,945.80x = 509,918.70 × 286,801.70
  4. Step 4: Simplify right side
    339,945.80x = 146,245,550,021.79
  5. Step 5: Solve for x
    x = 146,245,550,021.79/339,945.80
  6. Step 6: Final answer
    x = 430,202.55

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1.5x scale

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.