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Finding the Fourth Proportional to 521,646.50, 719,165.39 and 445,978.44

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Solution

The fourth proportional to 521,646.50, 719,165.39 and 445,978.44 is: 614,845.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,646.50 : 719,165.39 = 445,978.44 : x
  2. Step 2: Convert to fraction form
    521,646.50/719,165.39 = 445,978.44/x
  3. Step 3: Cross multiply
    521,646.50x = 719,165.39 × 445,978.44
  4. Step 4: Simplify right side
    521,646.50x = 320,732,256,504.30
  5. Step 5: Solve for x
    x = 320,732,256,504.30/521,646.50
  6. Step 6: Final answer
    x = 614,845.98

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.