Home / 678,443.78-1,018,132.20-235,211.78

Finding the Fourth Proportional to 678,443.78, 1,018,132.20 and 235,211.78

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Solution

The fourth proportional to 678,443.78, 1,018,132.20 and 235,211.78 is: 352,979.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,443.78 : 1,018,132.20 = 235,211.78 : x
  2. Step 2: Convert to fraction form
    678,443.78/1,018,132.20 = 235,211.78/x
  3. Step 3: Cross multiply
    678,443.78x = 1,018,132.20 × 235,211.78
  4. Step 4: Simplify right side
    678,443.78x = 239,476,687,037.32
  5. Step 5: Solve for x
    x = 239,476,687,037.32/678,443.78
  6. Step 6: Final answer
    x = 352,979.41

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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.