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Finding the Fourth Proportional to 439,775.40, 659,663.10 and 218,130.60

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Solution

The fourth proportional to 439,775.40, 659,663.10 and 218,130.60 is: 327,195.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    439,775.40 : 659,663.10 = 218,130.60 : x
  2. Step 2: Convert to fraction form
    439,775.40/659,663.10 = 218,130.60/x
  3. Step 3: Cross multiply
    439,775.40x = 659,663.10 × 218,130.60
  4. Step 4: Simplify right side
    439,775.40x = 143,892,707,800.86
  5. Step 5: Solve for x
    x = 143,892,707,800.86/439,775.40
  6. Step 6: Final answer
    x = 327,195.90

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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.