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Finding the Fourth Proportional to 720,789.52, 994,693.44 and 394,103.56

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Solution

The fourth proportional to 720,789.52, 994,693.44 and 394,103.56 is: 543,865.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,789.52 : 994,693.44 = 394,103.56 : x
  2. Step 2: Convert to fraction form
    720,789.52/994,693.44 = 394,103.56/x
  3. Step 3: Cross multiply
    720,789.52x = 994,693.44 × 394,103.56
  4. Step 4: Simplify right side
    720,789.52x = 392,012,225,812.65
  5. Step 5: Solve for x
    x = 392,012,225,812.65/720,789.52
  6. Step 6: Final answer
    x = 543,865.05

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1.5x scale

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.