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Finding the Fourth Proportional to 486,645.60, 729,651.60 and 436,879.20

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Solution

The fourth proportional to 486,645.60, 729,651.60 and 436,879.20 is: 655,034.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    486,645.60 : 729,651.60 = 436,879.20 : x
  2. Step 2: Convert to fraction form
    486,645.60/729,651.60 = 436,879.20/x
  3. Step 3: Cross multiply
    486,645.60x = 729,651.60 × 436,879.20
  4. Step 4: Simplify right side
    486,645.60x = 318,769,607,286.72
  5. Step 5: Solve for x
    x = 318,769,607,286.72/486,645.60
  6. Step 6: Final answer
    x = 655,034.40

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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.