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Finding the Fourth Proportional to 720,384.86, 994,134.18 and 393,704.54

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Solution

The fourth proportional to 720,384.86, 994,134.18 and 393,704.54 is: 543,313.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,384.86 : 994,134.18 = 393,704.54 : x
  2. Step 2: Convert to fraction form
    720,384.86/994,134.18 = 393,704.54/x
  3. Step 3: Cross multiply
    720,384.86x = 994,134.18 × 393,704.54
  4. Step 4: Simplify right side
    720,384.86x = 391,395,140,035.18
  5. Step 5: Solve for x
    x = 391,395,140,035.18/720,384.86
  6. Step 6: Final answer
    x = 543,313.94

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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.