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Finding the Fourth Proportional to 339,583.28, 509,374.36 and 90,265.28

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Solution

The fourth proportional to 339,583.28, 509,374.36 and 90,265.28 is: 135,397.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,583.28 : 509,374.36 = 90,265.28 : x
  2. Step 2: Convert to fraction form
    339,583.28/509,374.36 = 90,265.28/x
  3. Step 3: Cross multiply
    339,583.28x = 509,374.36 × 90,265.28
  4. Step 4: Simplify right side
    339,583.28x = 45,978,819,230.22
  5. Step 5: Solve for x
    x = 45,978,819,230.22/339,583.28
  6. Step 6: Final answer
    x = 135,397.77

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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.