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Finding the Third Proportional to 256,408 and 556,080

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Solution

The third proportional to 256,408 and 556,080 is: 1,205,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,408 : 556,080 = 556,080 : x
  2. Step 2: Convert to fraction form
    256,408/556,080 = 556,080/x
  3. Step 3: Cross multiply
    256,408x = 556,080 × 556,080
  4. Step 4: Simplify right side
    256,408x = 309,224,966,400
  5. Step 5: Solve for x
    x = 309,224,966,400/256,408
  6. Step 6: Final answer
    x = 1,205,987.98

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Why These Related Problems?

These problems maintain the same ratio (2.17) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.