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Finding the Fourth Proportional to 660,391.82, 990,714.85 and 281,305.44

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Solution

The fourth proportional to 660,391.82, 990,714.85 and 281,305.44 is: 422,012.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,391.82 : 990,714.85 = 281,305.44 : x
  2. Step 2: Convert to fraction form
    660,391.82/990,714.85 = 281,305.44/x
  3. Step 3: Cross multiply
    660,391.82x = 990,714.85 × 281,305.44
  4. Step 4: Simplify right side
    660,391.82x = 278,693,476,090.52
  5. Step 5: Solve for x
    x = 278,693,476,090.52/660,391.82
  6. Step 6: Final answer
    x = 422,012.31

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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.