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Finding the Fourth Proportional to 720,209.68, 993,929.23 and 397,912.86

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Solution

The fourth proportional to 720,209.68, 993,929.23 and 397,912.86 is: 549,141.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,209.68 : 993,929.23 = 397,912.86 : x
  2. Step 2: Convert to fraction form
    720,209.68/993,929.23 = 397,912.86/x
  3. Step 3: Cross multiply
    720,209.68x = 993,929.23 × 397,912.86
  4. Step 4: Simplify right side
    720,209.68x = 395,497,222,546.90
  5. Step 5: Solve for x
    x = 395,497,222,546.90/720,209.68
  6. Step 6: Final answer
    x = 549,141.78

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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.