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Finding the Fourth Proportional to 659,200.70, 987,488.85 and 343,835.30

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Solution

The fourth proportional to 659,200.70, 987,488.85 and 343,835.30 is: 515,068.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,200.70 : 987,488.85 = 343,835.30 : x
  2. Step 2: Convert to fraction form
    659,200.70/987,488.85 = 343,835.30/x
  3. Step 3: Cross multiply
    659,200.70x = 987,488.85 × 343,835.30
  4. Step 4: Simplify right side
    659,200.70x = 339,533,524,986.41
  5. Step 5: Solve for x
    x = 339,533,524,986.41/659,200.70
  6. Step 6: Final answer
    x = 515,068.51

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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.