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Finding the Fourth Proportional to 659,218.20, 987,515.10 and 343,852.80

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Solution

The fourth proportional to 659,218.20, 987,515.10 and 343,852.80 is: 515,094.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,218.20 : 987,515.10 = 343,852.80 : x
  2. Step 2: Convert to fraction form
    659,218.20/987,515.10 = 343,852.80/x
  3. Step 3: Cross multiply
    659,218.20x = 987,515.10 × 343,852.80
  4. Step 4: Simplify right side
    659,218.20x = 339,559,832,177.28
  5. Step 5: Solve for x
    x = 339,559,832,177.28/659,218.20
  6. Step 6: Final answer
    x = 515,094.75

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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.