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Finding the Fourth Proportional to 368,489.60, 551,422.20 and 255,640.40

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Solution

The fourth proportional to 368,489.60, 551,422.20 and 255,640.40 is: 382,550.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    368,489.60 : 551,422.20 = 255,640.40 : x
  2. Step 2: Convert to fraction form
    368,489.60/551,422.20 = 255,640.40/x
  3. Step 3: Cross multiply
    368,489.60x = 551,422.20 × 255,640.40
  4. Step 4: Simplify right side
    368,489.60x = 140,965,791,776.88
  5. Step 5: Solve for x
    x = 140,965,791,776.88/368,489.60
  6. Step 6: Final answer
    x = 382,550.26

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.