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Finding the Fourth Proportional to 659,778.72, 988,786.80 and 343,572.64

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Solution

The fourth proportional to 659,778.72, 988,786.80 and 343,572.64 is: 514,900.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,778.72 : 988,786.80 = 343,572.64 : x
  2. Step 2: Convert to fraction form
    659,778.72/988,786.80 = 343,572.64/x
  3. Step 3: Cross multiply
    659,778.72x = 988,786.80 × 343,572.64
  4. Step 4: Simplify right side
    659,778.72x = 339,720,091,273.15
  5. Step 5: Solve for x
    x = 339,720,091,273.15/659,778.72
  6. Step 6: Final answer
    x = 514,900.04

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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.