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Finding the Fourth Proportional to 345,865.73, 515,360.32 and 308,135.87

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Solution

The fourth proportional to 345,865.73, 515,360.32 and 308,135.87 is: 459,140.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,865.73 : 515,360.32 = 308,135.87 : x
  2. Step 2: Convert to fraction form
    345,865.73/515,360.32 = 308,135.87/x
  3. Step 3: Cross multiply
    345,865.73x = 515,360.32 × 308,135.87
  4. Step 4: Simplify right side
    345,865.73x = 158,800,997,989.88
  5. Step 5: Solve for x
    x = 158,800,997,989.88/345,865.73
  6. Step 6: Final answer
    x = 459,140.60

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.