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Finding the Fourth Proportional to 549,321.80, 823,982.70 and 438,729.80

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Solution

The fourth proportional to 549,321.80, 823,982.70 and 438,729.80 is: 658,094.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    549,321.80 : 823,982.70 = 438,729.80 : x
  2. Step 2: Convert to fraction form
    549,321.80/823,982.70 = 438,729.80/x
  3. Step 3: Cross multiply
    549,321.80x = 823,982.70 × 438,729.80
  4. Step 4: Simplify right side
    549,321.80x = 361,505,765,174.46
  5. Step 5: Solve for x
    x = 361,505,765,174.46/549,321.80
  6. Step 6: Final answer
    x = 658,094.70

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.