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Finding the Fourth Proportional to 512,010.30, 768,015.45 and 503,715.90

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Solution

The fourth proportional to 512,010.30, 768,015.45 and 503,715.90 is: 755,573.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    512,010.30 : 768,015.45 = 503,715.90 : x
  2. Step 2: Convert to fraction form
    512,010.30/768,015.45 = 503,715.90/x
  3. Step 3: Cross multiply
    512,010.30x = 768,015.45 × 503,715.90
  4. Step 4: Simplify right side
    512,010.30x = 386,861,593,610.66
  5. Step 5: Solve for x
    x = 386,861,593,610.66/512,010.30
  6. Step 6: Final answer
    x = 755,573.85

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Double scale
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Similar ratio
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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.