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Finding the Third Proportional to 275,599.50 and 390,078

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Solution

The third proportional to 275,599.50 and 390,078 is: 552,108.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    275,599.50 : 390,078 = 390,078 : x
  2. Step 2: Convert to fraction form
    275,599.50/390,078 = 390,078/x
  3. Step 3: Cross multiply
    275,599.50x = 390,078 × 390,078
  4. Step 4: Simplify right side
    275,599.50x = 152,160,846,084
  5. Step 5: Solve for x
    x = 152,160,846,084/275,599.50
  6. Step 6: Final answer
    x = 552,108.57

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Why These Related Problems?

These problems maintain the same ratio (1.42) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.