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Finding the Fourth Proportional to 483,618.50, 667,340.54 and 279,638.55

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Solution

The fourth proportional to 483,618.50, 667,340.54 and 279,638.55 is: 385,870.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,618.50 : 667,340.54 = 279,638.55 : x
  2. Step 2: Convert to fraction form
    483,618.50/667,340.54 = 279,638.55/x
  3. Step 3: Cross multiply
    483,618.50x = 667,340.54 × 279,638.55
  4. Step 4: Simplify right side
    483,618.50x = 186,614,142,489.16
  5. Step 5: Solve for x
    x = 186,614,142,489.16/483,618.50
  6. Step 6: Final answer
    x = 385,870.56

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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.