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Finding the Third Proportional to 258,664.50 and 399,071.25

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Solution

The third proportional to 258,664.50 and 399,071.25 is: 615,692.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    258,664.50 : 399,071.25 = 399,071.25 : x
  2. Step 2: Convert to fraction form
    258,664.50/399,071.25 = 399,071.25/x
  3. Step 3: Cross multiply
    258,664.50x = 399,071.25 × 399,071.25
  4. Step 4: Simplify right side
    258,664.50x = 159,257,862,576.56
  5. Step 5: Solve for x
    x = 159,257,862,576.56/258,664.50
  6. Step 6: Final answer
    x = 615,692.77

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.