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Finding the Fourth Proportional to 720,196.62, 993,786.62 and 397,887.50

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Solution

The fourth proportional to 720,196.62, 993,786.62 and 397,887.50 is: 549,037.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    720,196.62 : 993,786.62 = 397,887.50 : x
  2. Step 2: Convert to fraction form
    720,196.62/993,786.62 = 397,887.50/x
  3. Step 3: Cross multiply
    720,196.62x = 993,786.62 × 397,887.50
  4. Step 4: Simplify right side
    720,196.62x = 395,415,266,806.88
  5. Step 5: Solve for x
    x = 395,415,266,806.88/720,196.62
  6. Step 6: Final answer
    x = 549,037.94

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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.