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Finding the Fourth Proportional to 310,181.90, 428,161.01 and 187,680.60

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Solution

The fourth proportional to 310,181.90, 428,161.01 and 187,680.60 is: 259,065.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,181.90 : 428,161.01 = 187,680.60 : x
  2. Step 2: Convert to fraction form
    310,181.90/428,161.01 = 187,680.60/x
  3. Step 3: Cross multiply
    310,181.90x = 428,161.01 × 187,680.60
  4. Step 4: Simplify right side
    310,181.90x = 80,357,514,166.50
  5. Step 5: Solve for x
    x = 80,357,514,166.50/310,181.90
  6. Step 6: Final answer
    x = 259,065.78

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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.