Home / 491,029.36-678,001.80-383,412.76

Finding the Fourth Proportional to 491,029.36, 678,001.80 and 383,412.76

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Solution

The fourth proportional to 491,029.36, 678,001.80 and 383,412.76 is: 529,407.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    491,029.36 : 678,001.80 = 383,412.76 : x
  2. Step 2: Convert to fraction form
    491,029.36/678,001.80 = 383,412.76/x
  3. Step 3: Cross multiply
    491,029.36x = 678,001.80 × 383,412.76
  4. Step 4: Simplify right side
    491,029.36x = 259,954,541,422.97
  5. Step 5: Solve for x
    x = 259,954,541,422.97/491,029.36
  6. Step 6: Final answer
    x = 529,407.33

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Double scale
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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.