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Finding the Fourth Proportional to 720,872.61, 994,793.27 and 394,186.68

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Solution

The fourth proportional to 720,872.61, 994,793.27 and 394,186.68 is: 543,971.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,872.61 : 994,793.27 = 394,186.68 : x
  2. Step 2: Convert to fraction form
    720,872.61/994,793.27 = 394,186.68/x
  3. Step 3: Cross multiply
    720,872.61x = 994,793.27 × 394,186.68
  4. Step 4: Simplify right side
    720,872.61x = 392,134,254,416.71
  5. Step 5: Solve for x
    x = 392,134,254,416.71/720,872.61
  6. Step 6: Final answer
    x = 543,971.64

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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.