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Finding the Fourth Proportional to 398,606.28, 549,765.63 and 255,379.74

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Solution

The fourth proportional to 398,606.28, 549,765.63 and 255,379.74 is: 352,224.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,606.28 : 549,765.63 = 255,379.74 : x
  2. Step 2: Convert to fraction form
    398,606.28/549,765.63 = 255,379.74/x
  3. Step 3: Cross multiply
    398,606.28x = 549,765.63 × 255,379.74
  4. Step 4: Simplify right side
    398,606.28x = 140,399,003,650.34
  5. Step 5: Solve for x
    x = 140,399,003,650.34/398,606.28
  6. Step 6: Final answer
    x = 352,224.77

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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.