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Finding the Fourth Proportional to 263,326.30, 394,989.45 and 210,838.30

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Solution

The fourth proportional to 263,326.30, 394,989.45 and 210,838.30 is: 316,257.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    263,326.30 : 394,989.45 = 210,838.30 : x
  2. Step 2: Convert to fraction form
    263,326.30/394,989.45 = 210,838.30/x
  3. Step 3: Cross multiply
    263,326.30x = 394,989.45 × 210,838.30
  4. Step 4: Simplify right side
    263,326.30x = 83,278,904,155.94
  5. Step 5: Solve for x
    x = 83,278,904,155.94/263,326.30
  6. Step 6: Final answer
    x = 316,257.45

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1.5x scale

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.