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Finding the Fourth Proportional to 627,294.80, 865,672.20 and 340,815.44

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Solution

The fourth proportional to 627,294.80, 865,672.20 and 340,815.44 is: 470,328.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    627,294.80 : 865,672.20 = 340,815.44 : x
  2. Step 2: Convert to fraction form
    627,294.80/865,672.20 = 340,815.44/x
  3. Step 3: Cross multiply
    627,294.80x = 865,672.20 × 340,815.44
  4. Step 4: Simplify right side
    627,294.80x = 295,034,451,738.77
  5. Step 5: Solve for x
    x = 295,034,451,738.77/627,294.80
  6. Step 6: Final answer
    x = 470,328.23

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1.5x scale

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.