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Finding the Fourth Proportional to 297,321.60, 446,500.80 and 287,990.40

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Solution

The fourth proportional to 297,321.60, 446,500.80 and 287,990.40 is: 432,487.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    297,321.60 : 446,500.80 = 287,990.40 : x
  2. Step 2: Convert to fraction form
    297,321.60/446,500.80 = 287,990.40/x
  3. Step 3: Cross multiply
    297,321.60x = 446,500.80 × 287,990.40
  4. Step 4: Simplify right side
    297,321.60x = 128,587,943,992.32
  5. Step 5: Solve for x
    x = 128,587,943,992.32/297,321.60
  6. Step 6: Final answer
    x = 432,487.73

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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.