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Finding the Third Proportional to 198,810.75 and 427,285.50

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Solution

The third proportional to 198,810.75 and 427,285.50 is: 918,325.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    198,810.75 : 427,285.50 = 427,285.50 : x
  2. Step 2: Convert to fraction form
    198,810.75/427,285.50 = 427,285.50/x
  3. Step 3: Cross multiply
    198,810.75x = 427,285.50 × 427,285.50
  4. Step 4: Simplify right side
    198,810.75x = 182,572,898,510.25
  5. Step 5: Solve for x
    x = 182,572,898,510.25/198,810.75
  6. Step 6: Final answer
    x = 918,325.08

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Why These Related Problems?

These problems maintain the same ratio (2.15) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.