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Finding the Fourth Proportional to 339,693.76, 509,539.92 and 90,375.76

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Solution

The fourth proportional to 339,693.76, 509,539.92 and 90,375.76 is: 135,563.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,693.76 : 509,539.92 = 90,375.76 : x
  2. Step 2: Convert to fraction form
    339,693.76/509,539.92 = 90,375.76/x
  3. Step 3: Cross multiply
    339,693.76x = 509,539.92 × 90,375.76
  4. Step 4: Simplify right side
    339,693.76x = 46,050,057,520.34
  5. Step 5: Solve for x
    x = 46,050,057,520.34/339,693.76
  6. Step 6: Final answer
    x = 135,563.45

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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.