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Finding the Fourth Proportional to 509,181.69, 762,609.11 and 243,128.55

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Solution

The fourth proportional to 509,181.69, 762,609.11 and 243,128.55 is: 364,137.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    509,181.69 : 762,609.11 = 243,128.55 : x
  2. Step 2: Convert to fraction form
    509,181.69/762,609.11 = 243,128.55/x
  3. Step 3: Cross multiply
    509,181.69x = 762,609.11 × 243,128.55
  4. Step 4: Simplify right side
    509,181.69x = 185,412,045,915.45
  5. Step 5: Solve for x
    x = 185,412,045,915.45/509,181.69
  6. Step 6: Final answer
    x = 364,137.30

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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.