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Finding the Fourth Proportional to 488,653.80, 674,311.14 and 287,410.92

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Solution

The fourth proportional to 488,653.80, 674,311.14 and 287,410.92 is: 396,608.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    488,653.80 : 674,311.14 = 287,410.92 : x
  2. Step 2: Convert to fraction form
    488,653.80/674,311.14 = 287,410.92/x
  3. Step 3: Cross multiply
    488,653.80x = 674,311.14 × 287,410.92
  4. Step 4: Simplify right side
    488,653.80x = 193,804,385,113.65
  5. Step 5: Solve for x
    x = 193,804,385,113.65/488,653.80
  6. Step 6: Final answer
    x = 396,608.78

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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.