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Finding the Fourth Proportional to 383,281, 528,644.43 and 281,272

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Solution

The fourth proportional to 383,281, 528,644.43 and 281,272 is: 387,947.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    383,281 : 528,644.43 = 281,272 : x
  2. Step 2: Convert to fraction form
    383,281/528,644.43 = 281,272/x
  3. Step 3: Cross multiply
    383,281x = 528,644.43 × 281,272
  4. Step 4: Simplify right side
    383,281x = 148,692,876,114.96
  5. Step 5: Solve for x
    x = 148,692,876,114.96/383,281
  6. Step 6: Final answer
    x = 387,947.42

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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.