Home / 678,445.78-1,018,135.20-235,213.78

Finding the Fourth Proportional to 678,445.78, 1,018,135.20 and 235,213.78

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Solution

The fourth proportional to 678,445.78, 1,018,135.20 and 235,213.78 is: 352,982.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,445.78 : 1,018,135.20 = 235,213.78 : x
  2. Step 2: Convert to fraction form
    678,445.78/1,018,135.20 = 235,213.78/x
  3. Step 3: Cross multiply
    678,445.78x = 1,018,135.20 × 235,213.78
  4. Step 4: Simplify right side
    678,445.78x = 239,479,428,943.06
  5. Step 5: Solve for x
    x = 239,479,428,943.06/678,445.78
  6. Step 6: Final answer
    x = 352,982.41

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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.