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Finding the Third Proportional to 390,532.50 and 855,969.75

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Solution

The third proportional to 390,532.50 and 855,969.75 is: 1,876,115.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,532.50 : 855,969.75 = 855,969.75 : x
  2. Step 2: Convert to fraction form
    390,532.50/855,969.75 = 855,969.75/x
  3. Step 3: Cross multiply
    390,532.50x = 855,969.75 × 855,969.75
  4. Step 4: Simplify right side
    390,532.50x = 732,684,212,915.06
  5. Step 5: Solve for x
    x = 732,684,212,915.06/390,532.50
  6. Step 6: Final answer
    x = 1,876,115.85

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.