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Finding the Fourth Proportional to 279,674.90, 385,922.58 and 157,147.82

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Solution

The fourth proportional to 279,674.90, 385,922.58 and 157,147.82 is: 216,847.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,674.90 : 385,922.58 = 157,147.82 : x
  2. Step 2: Convert to fraction form
    279,674.90/385,922.58 = 157,147.82/x
  3. Step 3: Cross multiply
    279,674.90x = 385,922.58 × 157,147.82
  4. Step 4: Simplify right side
    279,674.90x = 60,646,890,206.16
  5. Step 5: Solve for x
    x = 60,646,890,206.16/279,674.90
  6. Step 6: Final answer
    x = 216,847.82

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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.