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Finding the Third Proportional to 256,518 and 556,840

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Solution

The third proportional to 256,518 and 556,840 is: 1,208,768.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    256,518 : 556,840 = 556,840 : x
  2. Step 2: Convert to fraction form
    256,518/556,840 = 556,840/x
  3. Step 3: Cross multiply
    256,518x = 556,840 × 556,840
  4. Step 4: Simplify right side
    256,518x = 310,070,785,600
  5. Step 5: Solve for x
    x = 310,070,785,600/256,518
  6. Step 6: Final answer
    x = 1,208,768.14

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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.