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Finding the Fourth Proportional to 722,079.20, 996,484.50 and 395,405.93

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Solution

The fourth proportional to 722,079.20, 996,484.50 and 395,405.93 is: 545,668.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    722,079.20 : 996,484.50 = 395,405.93 : x
  2. Step 2: Convert to fraction form
    722,079.20/996,484.50 = 395,405.93/x
  3. Step 3: Cross multiply
    722,079.20x = 996,484.50 × 395,405.93
  4. Step 4: Simplify right side
    722,079.20x = 394,015,880,453.09
  5. Step 5: Solve for x
    x = 394,015,880,453.09/722,079.20
  6. Step 6: Final answer
    x = 545,668.51

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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.