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Finding the Fourth Proportional to 659,213.64, 987,802.70 and 445,142.59

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Solution

The fourth proportional to 659,213.64, 987,802.70 and 445,142.59 is: 667,026.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,213.64 : 987,802.70 = 445,142.59 : x
  2. Step 2: Convert to fraction form
    659,213.64/987,802.70 = 445,142.59/x
  3. Step 3: Cross multiply
    659,213.64x = 987,802.70 × 445,142.59
  4. Step 4: Simplify right side
    659,213.64x = 439,713,047,591.77
  5. Step 5: Solve for x
    x = 439,713,047,591.77/659,213.64
  6. Step 6: Final answer
    x = 667,026.62

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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.