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Finding the Fourth Proportional to 720,245.52, 993,912.09 and 397,948.68

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Solution

The fourth proportional to 720,245.52, 993,912.09 and 397,948.68 is: 549,154.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,245.52 : 993,912.09 = 397,948.68 : x
  2. Step 2: Convert to fraction form
    720,245.52/993,912.09 = 397,948.68/x
  3. Step 3: Cross multiply
    720,245.52x = 993,912.09 × 397,948.68
  4. Step 4: Simplify right side
    720,245.52x = 395,526,004,251.54
  5. Step 5: Solve for x
    x = 395,526,004,251.54/720,245.52
  6. Step 6: Final answer
    x = 549,154.41

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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.