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Finding the Fourth Proportional to 339,690.12, 509,536.02 and 90,372.12

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Solution

The fourth proportional to 339,690.12, 509,536.02 and 90,372.12 is: 135,558.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    339,690.12 : 509,536.02 = 90,372.12 : x
  2. Step 2: Convert to fraction form
    339,690.12/509,536.02 = 90,372.12/x
  3. Step 3: Cross multiply
    339,690.12x = 509,536.02 × 90,372.12
  4. Step 4: Simplify right side
    339,690.12x = 46,047,850,343.76
  5. Step 5: Solve for x
    x = 46,047,850,343.76/339,690.12
  6. Step 6: Final answer
    x = 135,558.40

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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.