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Finding the Fourth Proportional to 515,433.40, 771,837.90 and 491,813.80

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Solution

The fourth proportional to 515,433.40, 771,837.90 and 491,813.80 is: 736,468.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,433.40 : 771,837.90 = 491,813.80 : x
  2. Step 2: Convert to fraction form
    515,433.40/771,837.90 = 491,813.80/x
  3. Step 3: Cross multiply
    515,433.40x = 771,837.90 × 491,813.80
  4. Step 4: Simplify right side
    515,433.40x = 379,600,530,583.02
  5. Step 5: Solve for x
    x = 379,600,530,583.02/515,433.40
  6. Step 6: Final answer
    x = 736,468.63

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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.