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Finding the Fourth Proportional to 398,606.03, 549,765.29 and 255,379.49

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Solution

The fourth proportional to 398,606.03, 549,765.29 and 255,379.49 is: 352,224.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,606.03 : 549,765.29 = 255,379.49 : x
  2. Step 2: Convert to fraction form
    398,606.03/549,765.29 = 255,379.49/x
  3. Step 3: Cross multiply
    398,606.03x = 549,765.29 × 255,379.49
  4. Step 4: Simplify right side
    398,606.03x = 140,398,778,103.01
  5. Step 5: Solve for x
    x = 140,398,778,103.01/398,606.03
  6. Step 6: Final answer
    x = 352,224.42

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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.