Home / 678,453.78-1,018,147.17-235,221.78

Finding the Fourth Proportional to 678,453.78, 1,018,147.17 and 235,221.78

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Solution

The fourth proportional to 678,453.78, 1,018,147.17 and 235,221.78 is: 352,994.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,453.78 : 1,018,147.17 = 235,221.78 : x
  2. Step 2: Convert to fraction form
    678,453.78/1,018,147.17 = 235,221.78/x
  3. Step 3: Cross multiply
    678,453.78x = 1,018,147.17 × 235,221.78
  4. Step 4: Simplify right side
    678,453.78x = 239,490,389,629.36
  5. Step 5: Solve for x
    x = 239,490,389,629.36/678,453.78
  6. Step 6: Final answer
    x = 352,994.41

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Double scale
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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.