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Finding the Fourth Proportional to 659,200.40, 987,245.40 and 447,693.20

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Solution

The fourth proportional to 659,200.40, 987,245.40 and 447,693.20 is: 670,483.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,200.40 : 987,245.40 = 447,693.20 : x
  2. Step 2: Convert to fraction form
    659,200.40/987,245.40 = 447,693.20/x
  3. Step 3: Cross multiply
    659,200.40x = 987,245.40 × 447,693.20
  4. Step 4: Simplify right side
    659,200.40x = 441,983,052,311.28
  5. Step 5: Solve for x
    x = 441,983,052,311.28/659,200.40
  6. Step 6: Final answer
    x = 670,483.59

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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.