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Finding the Fourth Proportional to 483,618.22, 667,340.15 and 279,638.28

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Solution

The fourth proportional to 483,618.22, 667,340.15 and 279,638.28 is: 385,870.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    483,618.22 : 667,340.15 = 279,638.28 : x
  2. Step 2: Convert to fraction form
    483,618.22/667,340.15 = 279,638.28/x
  3. Step 3: Cross multiply
    483,618.22x = 667,340.15 × 279,638.28
  4. Step 4: Simplify right side
    483,618.22x = 186,613,850,322.75
  5. Step 5: Solve for x
    x = 186,613,850,322.75/483,618.22
  6. Step 6: Final answer
    x = 385,870.18

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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.