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Finding the Fourth Proportional to 343,912.40, 515,868.60 and 308,920.40

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Solution

The fourth proportional to 343,912.40, 515,868.60 and 308,920.40 is: 463,380.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    343,912.40 : 515,868.60 = 308,920.40 : x
  2. Step 2: Convert to fraction form
    343,912.40/515,868.60 = 308,920.40/x
  3. Step 3: Cross multiply
    343,912.40x = 515,868.60 × 308,920.40
  4. Step 4: Simplify right side
    343,912.40x = 159,362,334,259.44
  5. Step 5: Solve for x
    x = 159,362,334,259.44/343,912.40
  6. Step 6: Final answer
    x = 463,380.60

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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.