Home / 400,128.78-552,157.25-218,805.47

Finding the Fourth Proportional to 400,128.78, 552,157.25 and 218,805.47

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Solution

The fourth proportional to 400,128.78, 552,157.25 and 218,805.47 is: 301,940.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    400,128.78 : 552,157.25 = 218,805.47 : x
  2. Step 2: Convert to fraction form
    400,128.78/552,157.25 = 218,805.47/x
  3. Step 3: Cross multiply
    400,128.78x = 552,157.25 × 218,805.47
  4. Step 4: Simplify right side
    400,128.78x = 120,815,022,745.34
  5. Step 5: Solve for x
    x = 120,815,022,745.34/400,128.78
  6. Step 6: Final answer
    x = 301,940.35

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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.