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Finding the Fourth Proportional to 339,619.80, 509,429.70 and 292,380.60

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Solution

The fourth proportional to 339,619.80, 509,429.70 and 292,380.60 is: 438,570.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,619.80 : 509,429.70 = 292,380.60 : x
  2. Step 2: Convert to fraction form
    339,619.80/509,429.70 = 292,380.60/x
  3. Step 3: Cross multiply
    339,619.80x = 509,429.70 × 292,380.60
  4. Step 4: Simplify right side
    339,619.80x = 148,947,361,343.82
  5. Step 5: Solve for x
    x = 148,947,361,343.82/339,619.80
  6. Step 6: Final answer
    x = 438,570.90

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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.