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Finding the Fourth Proportional to 398,601.80, 550,072.20 and 255,444.88

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Solution

The fourth proportional to 398,601.80, 550,072.20 and 255,444.88 is: 352,515.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    398,601.80 : 550,072.20 = 255,444.88 : x
  2. Step 2: Convert to fraction form
    398,601.80/550,072.20 = 255,444.88/x
  3. Step 3: Cross multiply
    398,601.80x = 550,072.20 × 255,444.88
  4. Step 4: Simplify right side
    398,601.80x = 140,513,127,120.34
  5. Step 5: Solve for x
    x = 140,513,127,120.34/398,601.80
  6. Step 6: Final answer
    x = 352,515.03

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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.