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Finding the Fourth Proportional to 491,361.78, 678,448.78 and 483,514.68

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Solution

The fourth proportional to 491,361.78, 678,448.78 and 483,514.68 is: 667,613.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,361.78 : 678,448.78 = 483,514.68 : x
  2. Step 2: Convert to fraction form
    491,361.78/678,448.78 = 483,514.68/x
  3. Step 3: Cross multiply
    491,361.78x = 678,448.78 × 483,514.68
  4. Step 4: Simplify right side
    491,361.78x = 328,039,944,758.09
  5. Step 5: Solve for x
    x = 328,039,944,758.09/491,361.78
  6. Step 6: Final answer
    x = 667,613.88

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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.