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Finding the Fourth Proportional to 279,698.20, 385,851.24 and 189,085.96

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Solution

The fourth proportional to 279,698.20, 385,851.24 and 189,085.96 is: 260,849.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,698.20 : 385,851.24 = 189,085.96 : x
  2. Step 2: Convert to fraction form
    279,698.20/385,851.24 = 189,085.96/x
  3. Step 3: Cross multiply
    279,698.20x = 385,851.24 × 189,085.96
  4. Step 4: Simplify right side
    279,698.20x = 72,959,052,132.59
  5. Step 5: Solve for x
    x = 72,959,052,132.59/279,698.20
  6. Step 6: Final answer
    x = 260,849.20

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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.