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Finding the Fourth Proportional to 393,076.80, 542,181.60 and 265,550.40

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Solution

The fourth proportional to 393,076.80, 542,181.60 and 265,550.40 is: 366,280.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,076.80 : 542,181.60 = 265,550.40 : x
  2. Step 2: Convert to fraction form
    393,076.80/542,181.60 = 265,550.40/x
  3. Step 3: Cross multiply
    393,076.80x = 542,181.60 × 265,550.40
  4. Step 4: Simplify right side
    393,076.80x = 143,976,540,752.64
  5. Step 5: Solve for x
    x = 143,976,540,752.64/393,076.80
  6. Step 6: Final answer
    x = 366,280.94

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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.