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Finding the Fourth Proportional to 659,617.20, 989,814.60 and 435,625.20

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Solution

The fourth proportional to 659,617.20, 989,814.60 and 435,625.20 is: 653,694.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,617.20 : 989,814.60 = 435,625.20 : x
  2. Step 2: Convert to fraction form
    659,617.20/989,814.60 = 435,625.20/x
  3. Step 3: Cross multiply
    659,617.20x = 989,814.60 × 435,625.20
  4. Step 4: Simplify right side
    659,617.20x = 431,188,183,087.92
  5. Step 5: Solve for x
    x = 431,188,183,087.92/659,617.20
  6. Step 6: Final answer
    x = 653,694.57

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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.