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Finding the Fourth Proportional to 664,687.64, 995,281.86 and 397,815.32

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Solution

The fourth proportional to 664,687.64, 995,281.86 and 397,815.32 is: 595,675.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    664,687.64 : 995,281.86 = 397,815.32 : x
  2. Step 2: Convert to fraction form
    664,687.64/995,281.86 = 397,815.32/x
  3. Step 3: Cross multiply
    664,687.64x = 995,281.86 × 397,815.32
  4. Step 4: Simplify right side
    664,687.64x = 395,938,371,626.10
  5. Step 5: Solve for x
    x = 395,938,371,626.10/664,687.64
  6. Step 6: Final answer
    x = 595,675.85

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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.