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Finding the Fourth Proportional to 606,821.80, 910,815.90 and 307,640.20

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Solution

The fourth proportional to 606,821.80, 910,815.90 and 307,640.20 is: 461,755.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,821.80 : 910,815.90 = 307,640.20 : x
  2. Step 2: Convert to fraction form
    606,821.80/910,815.90 = 307,640.20/x
  3. Step 3: Cross multiply
    606,821.80x = 910,815.90 × 307,640.20
  4. Step 4: Simplify right side
    606,821.80x = 280,203,585,639.18
  5. Step 5: Solve for x
    x = 280,203,585,639.18/606,821.80
  6. Step 6: Final answer
    x = 461,755.96

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Similar ratio
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1.5x scale

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.