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Finding the Fourth Proportional to 399,079.62, 550,953.60 and 276,749.76

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Solution

The fourth proportional to 399,079.62, 550,953.60 and 276,749.76 is: 382,069.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,079.62 : 550,953.60 = 276,749.76 : x
  2. Step 2: Convert to fraction form
    399,079.62/550,953.60 = 276,749.76/x
  3. Step 3: Cross multiply
    399,079.62x = 550,953.60 × 276,749.76
  4. Step 4: Simplify right side
    399,079.62x = 152,476,276,571.14
  5. Step 5: Solve for x
    x = 152,476,276,571.14/399,079.62
  6. Step 6: Final answer
    x = 382,069.81

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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.