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Finding the Third Proportional to 255,340 and 357,805.50

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Solution

The third proportional to 255,340 and 357,805.50 is: 501,389.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    255,340 : 357,805.50 = 357,805.50 : x
  2. Step 2: Convert to fraction form
    255,340/357,805.50 = 357,805.50/x
  3. Step 3: Cross multiply
    255,340x = 357,805.50 × 357,805.50
  4. Step 4: Simplify right side
    255,340x = 128,024,775,830.25
  5. Step 5: Solve for x
    x = 128,024,775,830.25/255,340
  6. Step 6: Final answer
    x = 501,389.43

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.