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Finding the Fourth Proportional to 513,255.40, 768,425.10 and 485,326.60

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Solution

The fourth proportional to 513,255.40, 768,425.10 and 485,326.60 is: 726,611.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    513,255.40 : 768,425.10 = 485,326.60 : x
  2. Step 2: Convert to fraction form
    513,255.40/768,425.10 = 485,326.60/x
  3. Step 3: Cross multiply
    513,255.40x = 768,425.10 × 485,326.60
  4. Step 4: Simplify right side
    513,255.40x = 372,937,141,137.66
  5. Step 5: Solve for x
    x = 372,937,141,137.66/513,255.40
  6. Step 6: Final answer
    x = 726,611.24

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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.