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Finding the Fourth Proportional to 297,691.20, 446,536.80 and 287,193.60

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Solution

The fourth proportional to 297,691.20, 446,536.80 and 287,193.60 is: 430,790.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,691.20 : 446,536.80 = 287,193.60 : x
  2. Step 2: Convert to fraction form
    297,691.20/446,536.80 = 287,193.60/x
  3. Step 3: Cross multiply
    297,691.20x = 446,536.80 × 287,193.60
  4. Step 4: Simplify right side
    297,691.20x = 128,242,511,124.48
  5. Step 5: Solve for x
    x = 128,242,511,124.48/297,691.20
  6. Step 6: Final answer
    x = 430,790.40

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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.