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Finding the Fourth Proportional to 398,769.60, 549,990.90 and 255,542.97

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Solution

The fourth proportional to 398,769.60, 549,990.90 and 255,542.97 is: 352,449.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,769.60 : 549,990.90 = 255,542.97 : x
  2. Step 2: Convert to fraction form
    398,769.60/549,990.90 = 255,542.97/x
  3. Step 3: Cross multiply
    398,769.60x = 549,990.90 × 255,542.97
  4. Step 4: Simplify right side
    398,769.60x = 140,546,308,058.97
  5. Step 5: Solve for x
    x = 140,546,308,058.97/398,769.60
  6. Step 6: Final answer
    x = 352,449.91

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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.