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Finding the Third Proportional to 255,828.75 and 391,540.50

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Solution

The third proportional to 255,828.75 and 391,540.50 is: 599,244.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,828.75 : 391,540.50 = 391,540.50 : x
  2. Step 2: Convert to fraction form
    255,828.75/391,540.50 = 391,540.50/x
  3. Step 3: Cross multiply
    255,828.75x = 391,540.50 × 391,540.50
  4. Step 4: Simplify right side
    255,828.75x = 153,303,963,140.25
  5. Step 5: Solve for x
    x = 153,303,963,140.25/255,828.75
  6. Step 6: Final answer
    x = 599,244.47

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Why These Related Problems?

These problems maintain the same ratio (1.53) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.