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Finding the Fourth Proportional to 431,703.40, 647,555.10 and 352,906.60

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Solution

The fourth proportional to 431,703.40, 647,555.10 and 352,906.60 is: 529,359.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    431,703.40 : 647,555.10 = 352,906.60 : x
  2. Step 2: Convert to fraction form
    431,703.40/647,555.10 = 352,906.60/x
  3. Step 3: Cross multiply
    431,703.40x = 647,555.10 × 352,906.60
  4. Step 4: Simplify right side
    431,703.40x = 228,526,468,653.66
  5. Step 5: Solve for x
    x = 228,526,468,653.66/431,703.40
  6. Step 6: Final answer
    x = 529,359.90

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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.