Home / 499,238.72-689,310.24-308,513.60

Finding the Fourth Proportional to 499,238.72, 689,310.24 and 308,513.60

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Solution

The fourth proportional to 499,238.72, 689,310.24 and 308,513.60 is: 425,971.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    499,238.72 : 689,310.24 = 308,513.60 : x
  2. Step 2: Convert to fraction form
    499,238.72/689,310.24 = 308,513.60/x
  3. Step 3: Cross multiply
    499,238.72x = 689,310.24 × 308,513.60
  4. Step 4: Simplify right side
    499,238.72x = 212,661,583,659.26
  5. Step 5: Solve for x
    x = 212,661,583,659.26/499,238.72
  6. Step 6: Final answer
    x = 425,971.73

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.