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Finding the Fourth Proportional to 439,419.40, 659,129.10 and 262,126.60

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Solution

The fourth proportional to 439,419.40, 659,129.10 and 262,126.60 is: 393,189.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,419.40 : 659,129.10 = 262,126.60 : x
  2. Step 2: Convert to fraction form
    439,419.40/659,129.10 = 262,126.60/x
  3. Step 3: Cross multiply
    439,419.40x = 659,129.10 × 262,126.60
  4. Step 4: Simplify right side
    439,419.40x = 172,775,269,944.06
  5. Step 5: Solve for x
    x = 172,775,269,944.06/439,419.40
  6. Step 6: Final answer
    x = 393,189.90

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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.