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Finding the Fourth Proportional to 628,612.68, 943,171.50 and 287,217.90

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Solution

The fourth proportional to 628,612.68, 943,171.50 and 287,217.90 is: 430,942.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    628,612.68 : 943,171.50 = 287,217.90 : x
  2. Step 2: Convert to fraction form
    628,612.68/943,171.50 = 287,217.90/x
  3. Step 3: Cross multiply
    628,612.68x = 943,171.50 × 287,217.90
  4. Step 4: Simplify right side
    628,612.68x = 270,895,737,569.85
  5. Step 5: Solve for x
    x = 270,895,737,569.85/628,612.68
  6. Step 6: Final answer
    x = 430,942.21

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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.