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Finding the Fourth Proportional to 479,051.40, 718,613.54 and 279,391.66

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Solution

The fourth proportional to 479,051.40, 718,613.54 and 279,391.66 is: 419,108.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    479,051.40 : 718,613.54 = 279,391.66 : x
  2. Step 2: Convert to fraction form
    479,051.40/718,613.54 = 279,391.66/x
  3. Step 3: Cross multiply
    479,051.40x = 718,613.54 × 279,391.66
  4. Step 4: Simplify right side
    479,051.40x = 200,774,629,839.08
  5. Step 5: Solve for x
    x = 200,774,629,839.08/479,051.40
  6. Step 6: Final answer
    x = 419,108.74

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.